I need help writing a chorus riff for a song

I want it to be a melodic kinda riff, along the lines of Atreyu's Aint Love Grand

Anything would be nice, since I'm stuck...

Oh, and I'm not a great guitar player. Good, but nothing Kirk Hammet-esqe, please

Thank a lot guys
how about (ive never listened to this song, but you said melodic) do something where you palm mute some arpegios - like the intro to aint talkin bout love. thats fairly simple and sounds kick ass. also very melodic.

other options? doodle about and see what you find