
I can't remember if it was my mother or my grandmother who taught me how to blindstitch. They were both excellent seamstresses. I think it was my mother. This picture is a good one. You can click it to make it even bigger.
The thing I remember my mother telling me, was, "You don't work right on the top edge, you work inside."
Yesterday's picture might show it a bit better. You can see that I have gently pulling the edge of the binding towards me very slightly...
(An aside here... I use double fold binding. I cut 3" wide strips, join them at a 45 degree angle, and press it wrong sides together. I line up the raw edges to the raw edge of the back of the quilt and then sew using a 3/8" seam. I miter the corners, and then join the binding ends together at a 45 angle, so you can't see where it starts and where it ends. I have seen this described as "bumpless." Then I simply fold the edge over to the front of the quilt and pin.)
You do your blindstitching just inside the binding. You are working right to left (assuming you are right handed.) Your needle comes out, and then you insert it just to the right of where it came out (a little back stitch), grab a little of the quilt, then go right into the binding, and come out again. Pull your thread snug (but not so tight you see a little pucker), then insert your needle just to the right of where it came out, and do it all over again.
This is partly successful for me because I am not paranoid about making the binding VERY tight or full, but there is a little bit of breathing room. Because this is hand work, it can vary the edge away from straight, so you have to be careful to keep your tension even so the binding gets sewn parallel to the edge of the quilt, and doesn't look like a sawtooth.
To do the mitered corner, Sara, sew one side down, then pivot, grab the other side of the "L", sew a bit of that down, then go back and sew the diagonal line created by the fabric overlap. I probably didn't describe that very well. Will try to get a picture when I reach the corner later tonight.
Thank you all for being so concerned about my arthritis. My problem spot is at the base of my right thumb, where the red arrow is pointing.

I got it in my early 40's, and yeah, it really sucks. It's the position, not the pressure, so anything that brings my thumb and forefinger together is going to aggravate it. The hardest thing to hold is a needle.
I use the fattest pens I can find, and generally try to do anything to avoid that position for an extended period of time. It doesn't give me
pain, but if I were to do any hand sewing for longer than my allotted 30" or 30 minutes, then my thumb just feels really stiff, and it isn't much good for anything the next day.
So I take it easy, and do lots of stretches to keep my fingers and hand limber. If I overdo it (overdoing it is defined as doing anything long enough until my hand really really hurts), the best thing to do is massage it with ice, and then rest, neither of which is any fun.