Sometimes, playing with my beads helps (just sorting, etc). Sometimes, playing "dress-up" and imagining what jewelry would look good with the outfits I put together. This helps get me in touch with the "child" in me (which is where my creativity seems most fertile).
Another source of ideas, is to look through photos of various other artists work for inspiration on style, color palette, etc. I also like to watch movies (or TV) where the actors wear interesting costumes, and I try to make jewelry for them.
Sometimes, however, burnout is the cause of my block. In which case, I need to go outside and play, or just do something unrelated to beading for awhile.
Of course, NEW BEADS work, too.