I mostly do borderless, I think. At least half, anyway. I don't do a lot of points, most of my quilts are really blocky so I don't do anything special at all. I'm guilty of not really squaring my quilts up much though too...although (maybe since they're fairly simple and blocky) they usually end up pretty darn square on their own. (Literally, even; most of my quilts are square, LOL)
I have done some with points though and for those, to avoid covering the points up with the binding, I will put a very thin border on that matches whatever I decide is the "background"; I'll cut it to about 1-1/2" before putting it on, and then once it's on I trim it down to 1/2" and THAT is what the binding overlaps.
I think I like Macybaby's technique though, I never thought of that, it seems very clever! I'll have to try it.