We all know the horrors of spec work, but even without doing spec work we all probably still have some work lying around gathering dust.
Maybe you did some work on a personal project and decided not to finish it up, or perhaps you where learning a new technique and did some test designs.
Rather than letting your work gather dust, why not sell it and pad that emergency fund, but where can you sell it?
Many marketplaces exist for designers to sell their stuff, some are specialized in graphics, domains, or complete websites, whilst others allow you to sell you stuff whatever it happens to be.
Forums popular among webmaster, designers and developer make for a natural place to sell your wares.