Pretty much just sync your new ppc once you get it.
You should make a couple different backups - pim backup is GREAT for making backups on the device itself
http://forum.xda-developers.com/showthread.php?t=299705
Make the backup to a storage card (or to internal memory, but then copy the backup to your PC via activesync)
You could also get a live.mail2web.com account, and sync your stuff up "in the cloud" for yet a third backup.