sort of stuck in a rut

i feel like my riffs r sort of all the same,if anybody can gimme some good riff ideas or just some tips to make my riff writing a lil better,it would be much appreciated,,,,,,,thanx in advance.

Learn more songs, study and understand exactly what you're learning. It's just down to what you want to hear from yourself though.

Chords Chords Chords (then more chords)

try differnt tunings? play in differnt keys/scales

Check out some of these lessons.

How to make metal riffs out of chords - By Empirism

The Art of Shredding Part 1: Rhythm

Progressive Metal Riffage

Should help you out a bit. I have found that that the best way to beat a rut is not to play for a couple days, then play as much as you can for a couple days, before returning to your normal practicing routine.

then once u learn those chords...learn some more chords. followed by scales which are of course based and played around scales (most of the time) then just for fun chords.

i learned a lot of chords by having my friend yell out random chords, i dont mean "c chord!" i mean like gimme a c#5b7#13 stuff like tht. or chord progressions and stuff.