1. Valuables you didn't know you owned - You might have valuable coins. rare books. video games or other items that you could sell, if you haven't already.
Even "recent" antiques can bring in some quick cash. Do you have Atari or early Nintendo or Sega video games? Many are worth a fair penny. Check your basement or attic for collectibles and antiques you didn't know were worth anything.
2. Sell your old or broken jewelry - Have some old gold or silver jewelry you don't mind parting with? The condition doesn't matter, gold and silver buyers pay by weight (and purity).
It is usually very easy to find someone in the yellow pages or classified ads. You can also ask your local pawn shops and do a google search for "gold buyer yourlocation ".
Please note: the faster you need to sell something, the less money you are likely to receive. If you need to sell something valuable to a pawn shop -- you definitely won't be getting top dollar.