You need an up to date travel guide, and a towel. A really cool spaceship can't hurt, either.
Other things that you should take note of are carefully hidden planning documents. Run away from alien poetry, and if you have any machines that talk, then hopefully it was someone else that paid for them. Otherwise, you should ask for your money back.
Some glue plate mouse traps work best, too, I think, from experience.
Really bloody funny.
5 out of 5