I tend to leave relevant data out of my posts, or word something in a confusing way, so I edit quite a lot
Become the fang for those who have none! Help FanserviceFTW!I edit exactly as often as I have to—no more, no less.
(Well, actually, probably a little less, if anything. I probably miss a mistake here or there.)
I generally deal with the editing smudge by adding a brief comment describing why I edited, e.g. "edit: typo", or "edit: fixed link", or even "edit: I completely forgot the whole reason I made this post, which was blah-blah-blah...".
I edit a lot. I'm on an iPad most of the time, and I frequently think of things right after I post. Usually, though, unless I use "ETA," I'm just editing for spelling and grammar.
ETA: Like so.
edited 3rd May '12 5:05:33 AM by Exelixi
Mura: -flips the bird to veterinary science with one hand and Euclidean geometry with the other-Edited to add?
"If you aren't him, then you apparently got your brain from the same discount retailer, so..." - Fighteer

I edit posts a lot, often due to typos, clarification, ninjas requiring more arrows, and other things.