I use weird chords and lots of muted strings and pick scrapes and palm mutes. And using a baritone guitar, I jump around to different octaves a lot. Any song I play, I totally make into my own. Also, I occasionally go crazy with effects; for example, if a song uses a light delay, I may substitute a sharp tremolo or even a step phaser. If I ever feel like my playing is getting too mechanical (like after practicing lead techniques like scales and sweeps), I sit back and listen to Nirvana. Kurt Cobain's sense of groove is one thing I consciously try to emulate.