#1
I'm trying to get better at pitch harmonics, can anyone give me any pointers? or a site that can help me on it.
#2
Don't you mean PINCH Harmonics?

If that's the case, the best way I found to make one is using a small pick (Dunlop Jazz picks work fine for me) and don't strum down directly, but a bit tilted (and brush the string with your thumb, but I reckon you already know this).

I saw a vid of some guy explaining this in detail a while ago... I'll look it up for ya.
#4
go onto youtube and type in pinch harmonics, there is a good one on there by justin sandercoe (i believe his name is). its a good vid and it helped me