Have a great party tip?

We all love a good party. The getting-together, the decorating, and most of all the food! Do you have some great tips on how to throw it all together? Maybe you have a clever way to set up the bar area for those "adults only" events? Or, perhaps you have a great tip that saves tons of time when it comes to cleaning up? Do you have a no-fail hostess gift? Is there a fun "double duty" item you use to save a little cash? If you have a great tip for parties, we want to hear all about it!