Practice, practice, practice. Get out of your comfort zone. Try everything you can think of, as it will often lead you to something even better.
I really like this
Text is something you really need to master before you mess with it. A great piece can really be ruined by misplaced, or awkward looking text. For me, simple is always best, but if you're gonna have alot of text, make sure it's properly placed, and matches the theme of sig.