I don't know if this belongs here, but how do you guys come up with riffs or a whole song.
Messing about, I reckon will be most peoples answer. It's mine aswell.

I'm hoping to learn enough theory so it doesn't have to be like that.
^Theory doesn't help you think of ideas for songs, it just makes it easier to develop those ideas.
I think of a rhythm, and then apply notes in a scale to the rhythm, and then tweak it from there. Sometimes they're good, sometimes they suck, that's just the way it goes.
Quote by dudetheman
So what? I wasted like 5 minutes watching DaddyTwoFoot's avatar.

Metalheads are the worst thing that ever happened to metal.
Improvisation. Read Tom Hess's articles on his website. They'll solve your doubt and give u more ideas.
Quote by hendo123456789
invincibleneo - you are one of the only people in this thread that talk sense.
Run a search, there are some threads on how people write songs. Everyone is different though. Sometimes I just work with arpeggios and scale, other times, I just mess around, see that it fits into the scale, and expand from there. My playing has been sounding the same recently, so I just need to experiment with different things (different chords, scales, different intervals, rhythms, etc.).