. . . the easy way.
Like all my quilting ways and means, this is the shortest route to the end.
1. When you're finished quilting, trim the extra batting to be even with the quilt top. Be careful with the scissors so you don't cut through the backing (ask me how I know). Then trim the backing so that there's approximately an inch of margin. Look at my inch. It's not exact or even--it's actually ragged, but it's close enough for this approach.

2. When all is trimmed, fold the back in so that the raw edge meets the edge of the quilted top. Then fold that folded edge in over the quilt. Now everything is tidy and nice. Pin it in place. Do the whole side.

3. All that's left to do is to slip stitch the folded edge in place. Slip stitching is practically invisible and is very easy to do with a little practice. See how the needle travels under the binding, but not so far down that it pierces through the back, then comes up again very close to the folded edge. Then it goes into the quilt just a tiny tiny bit, so that the stitch hardly shows. (Feel free to google some better instructions!).

I treat the corners quite simply--I go down one whole side, then turn the quilt and go the next way. I don't mitre or do anything fancy.
And that is the Unambitious Quilter's guide to binding!