Last Call! Only 24 hours left until the submission deadline for GOOD Magazine’s Everyday Solution to an Extraordinary Problem design project, sponsored by Nau. There’s still time to post your idea as a comment to GOOD’s contest page, tweet @GOOD, or e-mail projects[at]goodinc[dot]com with a pressing global problem and your creative, DIY solution. If yours is the best, you’ll win a $500 Nau gift certificate. So think quick, and don’t forget to post your ideas here, too, in the comments section below.