Any sufficiently advanced technology will be indistinguishable from magic, and will usually cost less. Be careful what you wish for, especially on planets where magic works. Don't pretend to be someone else unless you're sure that you can get away with it. Keep a set of spare keys in your shoes. Keep your lies simple and consistent.
Laughter is a universal language.
Especially evil laughter. Look in the obvious places first. Never carry a weapon with an ego bigger than your own. Never confuse wisdom with luck. Never fire energy weapons in an enclosed space.