Sell something.

Dig out that old guitar you never play, those CDs you don't listen to anymore, or your antique toy collection. Go to the pawnshop, put an ad on local internet classifieds, or hold a yard sale in front of your house or on a busy street corner (just display the item with a big sign announcing the ridiculously low price). Price items at half of what somebody would be able to buy them for anywhere else, and you may be able to sell them within an hour or two. You can also sell items online at web sites like eBay, Amazon and Craig`s list.