Harmonics
Off the top of my head, I can think of a few ways to get harmonics.
1) go to second position "G"string, and put your index finger on the second fret,your pinky on the fifth fret, and pull off on the open string over and over (sounds like the beginning of the solo on "heartbreaker" by Led Zep ..the first 4 notes of it anyway) now while doing this, touch the string litely with the opposite hand over the pickups and slide it back on forth.You'll get a whole barrage of harmonics.
2)the old standard,litely touch the string over the metal of the 7th fret and bounce you finger off it while picking the string.This should ring out a natural harmonic.There are actually TWO sets of these between the 3rd and 4th frets...one closer to the third, one closer to the forth...they're VERY high harmonics and tough to get,but they're there. First fret harmonics can be done as well,but it's a chore.
3)Eric Johnson uses this on the "Cliffs of Dover" solo. I also saw Stever Morse do this live. It's a variation of what classical guitarist do.Fret a note somewhere past (or around) the 12th fret. Hold the pick between your middle finger and thumb leaving your index finger about 2-2 1/2 inches away from it.Now while you pick the string, BARELY touch the string with your index finger at the same time...a high harmonic will sound.It helps if you have a distorted reverby stadium sound on the amp
4) Tapping harmonics.Eddie VanHalen does this on the solo in "Dance the Night Away". If you tap the fret (metal part,not the wood), 12 frets above a note you are playing, you'll get the harmonic.You can even do this with some chord voicings and have three harmonics going at once.
If I sat here a while I'd probably come up with more,but this should keep you busy...hope this helps
J.P.