Yep, use your shortcuts. In the message list, tap "t" to go to the top of the list, tap 'b' to go to the bottom. Tap 'p' to go to the top of the previous day.
There are many more, look at the link in my signature for Stinsonddogs Tips, click and scroll to the bottom of his page and download the PDF on the 8700 tips. Worth printing out and keeping with you a few days to learn.
I also prefer using 'u' to jump to the first unread message, and you can push 'u' again to go to the next unread message, and so on.
Another useful shortcut is when you have the message open hit 'n' to go to the next message in your list, or 'p' to go to the previous. These shortcuts also work when you're in the message list, but take you to the date header (next or previous).
Welcome to the wonderful world of what makes Blackberry way better than any PDA/Smartphone.
Check out the links mentioned in the previous posts for many more.