Try a different tuning. And take a "less is better" approach to this. You don't have to go crazy and do some CREED double dropped open D tuning and make every string sound like the other (even though that tuning sounds very sweet, you can't really play a wide variety in it).
Drop-D is a good one. I use it alot. Just dropping one string a whole makes a big difference. There some chords that you'd never be able to reach if you didn't use this tuning. It expands your playing field. Check it out.
Don't be afraid to experiment. If something doesn't sound write, twist a tuning peg here and there. And if you're not one for alternate tunings, just try odd-ball chord shapes. Do something you wouldn't normally do. Maybe you'd come up with something cool.
The basis of songs comes from jamming. The more you jam, the more cool things you come up with. It's that simple.
Later.
