If you're feeling creative and want a challenge, try designing a tshirt design for Threadless. It's open to anyone to submit a design. The designs get voted on in 7 day cycles and if yours is chosen to get printed, you win $2000.
Even if $$$ can't inspire you to get crafty, you can still feel good about shopping there because you're supporting independent artists and businesses. And you're getting a limited edition t-shirt at really reasonable prices.