If you've got a Pre or know someone who does, point to Precentral.net for the latest information, news, and tips.
It's one of the better sites for Pre I've seen. To top it off, they're offering their tips (some) in PDF format for Pre mobile warriors to download.
Link is here.
From what I can see, it's got the most basic information that a new Pre user needs to know to operate their Pre efficiently. There are two things about this. You'll need to be a registered member of the Pre forum. It's a small step to take considering the PDF file you'll be getting and able to contribute to the forum.
So, go already. Oh, you're wondering what the second thing is. It won't help fill up the Pre app store with apps. Sorry.