Multiple Browser Windows
Saw a question about this in another thread, figured I'd add it on.
The OP of this thread should compile all of these tips into the first post or something. Anyway...
When you're in the browser, you can use the Menu key, and select "New Window." Then, whenever you want to swap back to a previous page you had open, you can select Menu >> Windows, and it shows you a listing of all the browser windows open.
Kind of like multiple tabs.