One-a-Day Rule
A while back I watched a special about contemporary Japanese artists. Among them was an amazingly prolific guy who was producing weird stuff out of odds and ends he'd find around - everything from paper clips and soda cans, to strips of silk and handmade paper. He said he has a one-a-day rule and insists on creating one piece of art each day. His tiny Tokyo apartment was chock-full of clangy, clunky, scrappy bits and they showed him frantically working on another one of those, on a futon, framed by his art.
It made me laugh, because I have the same rule, and there was a point in time when my poor husband got freaked out and felt he had to ask, very nicely and cautiously: "Honey, how many of those do you intend to make?...Not that I mind, only there's no more room to hang them..." When my icons and paintings started to sell there were no more wall-space issues, though. (Men!)
One-a-day is a great rule, although I don't insist on finishing one piece of art a day, just that one creative thing has to be done daily. It can be anything, from working on a new web page (or a blog entry!), to writing, painting, or working on icon. On some days making a floral arrangement will have to do, on others it will be a whole new painting. But it certainly keeps the creative juices flowing, even when you don't feel like it.