It's ok to machine bind. Or any other "rule breaking" quilting technique
 you want to do. It's ok. I used to be a bit ashamed that I don't hand 
bind, but I'm letting go of that. 

My
 crafting philosophy is about how to get the most done with the least 
time/effort. I like short cuts. I'm ok with that. If I were to hand bind
 my quilts like you are "supposed to" I would have precisely 0 quilts 
completed, rather than dozens. I have come a long, long way in machine 
binding and have finally developed this method after tons of practice 
and experimenting. 
This tutorial is going to assume nothing 
about your quilting skills, please excuse any simplicity in the interest
 of full clarity. And, actually, if you want to hand bind, just follow 
the tutorial up until the last step (and also attach your binding to the
 front, rather than the back).
Materials needed:
Quilt sandwich
2 1/2 inch strips of fabric to equal the perimeter of your quilt sandwich plus about 12 inches (more for seaming)
1/4 inch foot for your machine (not a total necessity, but it's nice!)
steaming iron
To
 start with we'll do a little math and cut our binding strips. My quilt 
sandwich for this project was 19 inches square. 19 x 4 =76
76 + 12 =88
WOF
 (width of fabric) is about 42-44, let's say error on the lower side and
 then say 41 after cutting the selvedge off. So, to hit 88 inches we'll 
need 2 strips of fabric. I went nuts and decided to do 2 1/2.
1.)
 Cut your fabric strips 2 1/2 inches wide. I fold my fabrics selvedge to
 selvedge, and then once again and slice off the end through 4 layers. 
You need to be careful doing this so it's not crooked, but it's another 
one of my shortcuts/something I don't do "exactly right."  

 
      
      
      
      
2.) Once you have your strips, piece them together 
on a diagonal. A diagonal seam will help the bulk be spread out in the 
final binding, rather than all on top of each other making a thick spot 
that looks weird and is tough to sew over.
Lay 2 strips right 
side together perpendicularly to each other, and pin on both sides as in
 the picture. With a pencil and ruler, draw a diagonal line from corner 
to corner. 
 
      
      
      
      
Using a standard foot, stitch along the line and cut off the excess fabric, leaving a 1/4 seam allowance or so.
 
      
      
      
      
Press the joining seams open.
 
      
      
      
      
3.) Press your binding. Fold in half, wrong sides together, and press, using some steam if you like (I like).
Yay, pretty binding!
 
      
      
      
      
4.) Now we'll attach it to the backside of your 
quilt sandwich. That's right, the back. Usually when binding you start 
on the front. Start by changing to your 1/4 inch foot, if using one.
Pin
 your binding to the back of the quilt sandwich. With one pin, it's the 
only pin we're going to use. Pick the middle or right side of any one 
side of your quilt sandwich and pin the binding. Leave about 6-8 inches 
of binding dangling, we'll use that later. The raw edge of your binding 
should align with the raw edge of your quilt sandwich.
 
      
      
      
      
5.) Begin to stitch, using a 1/4 inch seam. I use my
 1/4 inch foot for this, again, because it's easy and consistent. Back 
stitch whenever you start and stop in the following directions. Stitch 
until you are 1/4 inch from the first corner.
 
      
      
      
      
Back stitch and pull the work out. You may cut the thread or let it dangle, whichever you prefer.
Now
 we are going to fold to create the mitered corners. Fold the binding to
 your right, creating a diagonal crease. Sadly my fingers are kind of in
 the way so you can't see the fold very well, but you can see the angle 
that I folded the binding.
 
      
      
      
      
Now, holding that first diagonal fold in place, fold
 the binding straight down, so it is now parallel with the next side we 
will be sewing.
 
      
      
      
      
Rotate your work as we are now sewing a new side and
 carefully ease the folded binding back into your machine. Starting at 
the very edge (not 1/4 inch in like when we stopped sewing), begin 
sewing and go ahead and back stitch.
 
      
      
      
      
6.) Continue stitching all sides and work each 
corner as described above. When you round the fourth corner*, stitch a 
couple of inches on the new side (the side you started on), back stitch,
 and remove from the machine. Now we are going to connect the binding 
beginning to the end.
*This is a small quilt, if you're working 
on a big one then maybe you want to stitch halfway down the side or 
more, usually having 1-2 feet of working space is ideal. More than that 
and your binding might be too loose, less than that and it's a nightmare
 to sew together.
7.) Usually we're told to overlap the ends of 
the binding as much as their original width. I've found that that makes 
my binding a little bit too loose, so I subtract 1/4 inch from that. 
Since we started with 2 1/2 inch wide binding, we want to overlap 2 1/4 
inches. Lay a ruler on top of the dangling binding from the beginning 
(remember how we left a piece unstitched before our first and only pin?)
 and the piece you rounded the corner with. Overlap them 2 1/4 inches 
and cut off any tails. If you center this as well as you can it will be 
easier for the next step.
 
      
      
      
      
8.) Attach the ends of the binding together. (You 
might need to switch back to your regular foot for this step, I always 
do). To do this, you want to open up the binding and put the two pieces 
right sides together in the same perpendicular manner as we did earlier.
 The more room you have to do this, the easier, so if you have several 
inches of not stitched down binding on each side, all the better (this 
is why we left the binding dangling at the beginning and stopped 
stitching soon after we came around that final corner).
 
      
      
      
      
Pin, draw your diagonal line, and stitch as before. 
Before cutting your seam allowance however, be sure to fold the binding 
back together, just to make sure you've stitched correctly. I can't tell
 you how many times I stitched on the wrong diagonal or had the binding 
twisted. As long as you haven't cut off the excess seam allowance yet, 
it's not too hard to rip out your stitches and start again.
 
      
      
      
      
 
      
      
      
      
 
      
      
      
      
Ok, once you know you're good you can trim and iron 
the seam allowance, and then iron the seam in your binding fold again 
since it's probably a little messed up.
9.) Finish sewing the 
last side of your binding. Back Stitch. Yay, your binding is now 
attached and you have done a continuous binding! Go ahead and switch 
back to your regular foot, we're done with the 1/4 inch foot now.
10.)
 This step insures a crisp fold and an even amount of binding showing on
 the front side. Take the folded side of the binding and fold it again 
so that the original fold is perpendicular to the raw edges. We're going
 to iron this on all four sides. Don't get too close to the corners, 
leave them alone for now.
 
      
      
      
      
11.) Go ahead and flip your quilt over to the right
 side. We're going to machine sew the binding to the front now, using 
the regular foot for your machine. I would advise changing to a color of
 thread that closely matches the color of your binding if you want it to
 blend in. I usually do so, but didn't this time. Starting in the middle
 of one side, fold the binding over to the right side of the quilt. The 
fold we just created with the iron will line up with the edge of the 
quilt and fit snugly.
12.) We're going to being stitching very, 
very closely and slowly to the edge of the binding fold. If your machine
 has a speed regulator, I recommend slowing it down. Begin stitching 2 
needle widths or so from the edge of the fold of the binding (maybe a 
millimeter? If you're very far away from the edge it will stick up and 
not look good). Only take 1 or 2 backstitches as you begin. Like I said,
 pins aren't needed. Just fold a few inches over at a time, going 
slowly, and stitch them down. The folded binding will easily cover the 
1/4 inch stitch line we used attaching the binding.
 
      
      
      
      
13.) When you get a few inches away from the corner,
 fold and smooth the next side down a few inches from the corner (the 
binding that is currently horizontal to your machine). Use your finger 
to fold all the way to the corner. When you get to the corner, fold your
 current side (the side your are currently stitching) down. Hold the 
corner in place as you stitch to the corner. (the next 4 pictures 
probably show this better than words)
 
      
      
      
      
 
      
      
      
      
 
      
      
      
      
 
      
      
      
      
Stop with your needle down in the corner, raise your
 presser foot, and pivot the work beneath you. Sew the new sides, slowly
 and carefully until you get to the next corner and proceed as above. 
When you get back to your starting place, backstitch just two or three 
times. Carefully cut your thread ends. Do a little binding dance, 
because you're done, baby!
 
      
      
      
      
