Besides being familar with what you are entitled to, make sure you keep photocopies of any paperwork submitted to PSD for travel claims, etc.
As I learned on my last PCS, PSD has a nasty habit of 'losing' paperwork and making you resubmit things and start all over. Since, I was able to produce copies of my original paperwork after PSD misplaced mine it helped get my travel claim completed. Ohh and don't be afraid of using your chain of command for help. Just be sure to show initiative on your part for trying to get your paperwork done, but sometimes it takes an upset O-5 from your squadron to call PSD and 'help' your travel claim through the system.