[quote="Marekenshin"]speaking of harmonic...how do you do harmonics? (noob here XD)[/quote]

This is how I do harmonics...you'll need some at least DECENT pickups with a bit of gain to get harmonics sounding their best.

Hold your finger very lightly over...the G-string's 9th fret. Very lightly just over the fret. Hit the string with your pick normally, and then quickly pull your fretting finger off of the string.

You'll need to experiment to see which positions work best - harmonics don't work everywhere with me.

Just try going really really fast, gliding your finger lightly over the strings - you'll find something.

Natural harmonics are performed as GoldenRhino suggested, on any string, over certain fret positions. However, you don't even necessarily need to hold your finger very lightly over, say, the 12th fret, nor do you need sensitive pickups to play a harmonic there (you can even do it acoustically). You can also play a harmonic by playing the open string and placing your hand at any harmonic-friendly fret (it doesn't have to be an open string, but on fretted strings, you have to calculate the positions yourself, which takes more practice).

Harmonics work by creating nodes in between the two ends of the vibrating string (hence increasing frequency and, thus, pitch). Here's where that harmonic series that you may have learned of comes into play (1, 1/2, 1/3, 1/4, etc.). Harmonics will best work on the 12th fret (which will effectively split the wavelength in half), the 7th fret (which will split the wavelength in thirds), the 5th fret (which will split it in fourths), and so on.

Another type of harmonic is a pinch harmonic. I'll only briefly go over it, since you probably aren't referring to it. It is performed by quickly pinching the string (once again, you have to find the right places - but it's not as hard as it sounds) with your picking hand as you pick it, often accompanied by a bend (although not necessarily).

so basically there are certain places where you can create a cool sound by not pushing down all the way and then releasing?

Just resting your finger lightly on the string and then taking it off as you hit. In certain places, it creates a soft bell-like sound. If you're playing through some distortion it'll sound more like nice ringing feedback.

Basically, this "cool sound" is a tone that you can likely find elsewhere on the fretboard, but it will sound more like an open string.

For instance, all 12th fret harmonics are the same tone as if you had just played the 12th fret notes. That is, one octave greater than the open string.

A 5th fret harmonic will sound an octave and a fifth greater than the fifth fret note. That is, two octaves greater than the open string. Like, if you played it on the 6th string, it would sound the same as a note played on the 19th fret of the 5th string. You can hear the airy, bell-like quality of the tone, though.

On the 7th fret, a harmonic will sound an octave greater than the seventh fret note, which is an octave and a fifth greater than the open string. A 7th fret harmonic on the 6th string will sound like the 9th fret note on the 4th string.

Pinch harmonics are probably even "cooler," however, it still comes down to simple physics.

it's all nodes, anti-nodes, harmonic numbers, and standing waves.

I only have an acoustic for now, so I can't be sure if I'm doing it right...but I think I'm sort of getting the hang of it. (sort of...)