I've been playing guitar for about two years now and I've been wanting to play more metal lately, but metal bands use a lot of harmonics and mutes. I don't know how to pull them off. Could someone here tell me the proper harmonic and palm muting techniques. Thanks a lot.
search the lessons, theres several on these subjects.
The Gear:

Custom Strat
Mesa Boogie Stiletto Ace
Fulltone OCD
Electro Harmonix Small Clone Chorus
Dunlop Crybaby Classic
MXR EVH-117 Flanger
Fulltone Soul Bender
Palm muting is basically when you use the meaty part of your hand and place it across the strings near the bridge. The more of your hand you use, the more percussive the note sounds.