OK, Harmonics:

First, the theory here

You get a pinch harmonic by picking in such a way that the side of your thumb hits the string just after the pick - use your bridge pickup and as much gain as you can to start with. Vibrato brings the harmonic out a bit as well.

Natural Harmonics come from touching your finger on a string, right over the fretwire and picking - gets you a sound a bit like a bell ringing - experiment on different frets. It's easy to get these on the octave of whatever note you're playing.

Artificial Harmonics - like the above, but with the octave manipulated. Found a lesson on this site for that one: http://www.guitartricks.com/lesson.php?input=8232

And Dive Bombing is dumping your trem all the way down until the strings are slack.... I tend to do the odd pick slide / dive bomb move, but that's it...