First, for a really comprehensive guide to learning this trick, I recommend you go to Tony Gales End-Overs tip on FreestyleTrickTips.com, on which Tony guides you from the very beginnings of this move. Tony gives you some variations that are very much part of the basic freestyle movement vocabulary that I’ll probably not cover here.
End-overs are one of the most basic elements of freestyle, and in my opinion skateboarding in general, and are often overlooked. Until I started this project I honestly had no idea that people have trouble with this. I suppose because it is one of the first things I learned back in about 1975 or 76, it has just never occurred to me that everyone doesn’t do these. But I think skating began to be so vert and later street oriented that people just didn’t learn this.
So here’s my tip. It is intended as “additional commentary aimed at the old guys” to Tony’s more comprehensive instruction.
I would also point out that when you can do endovers easily, stuff like this becomes easier as well, though it isn’t freestyle. Freestyle really should be, in addition to and end in itself, the fundamental building block of your skating.