Quote Originally Posted by jfkansas View Post
A lot I have seen throw themselves way off by not leveling at the same general temp range. One time they will level at 90degrees, then they will get lazy and decide to check the leveling with the machine cold. When they level cold it throws the leveling off. Then when they start a print they heat it up and it is all out of whack.

There are several nyloc style leveling nuts out there. Here is mine. http://www.thingiverse.com/thing:353353
That's probably one of the best tips on here. I used to do my levelling cold all the time - makes a helluva difference doing it hot, saves much pain.