When UPS looses your package

What do you do? I placed an order with Amazon, and they split it up, shipping one thing all by it's lonesome. The rest of my package arrived just fine, but the one that supposedly arrived five days ago is not there. Frankly, they don't give me any sort of information on how to approach a lost package.

Halp?!

If UPS doesn't help, call Amazon. Amazon usually resends packages that are lost without asking many questions.

Awesome. Thanks guys. I probably posted this thread prematurely without looking hard enough.