Everything!
- phone
- email (BIS not BES)
- calendar, deadlines, etc.
- address book (once you have integrated phone book, you are hooked for life)
- tasks
- note pad (everything from notes on-the-go to grocery list)
- alarm clock
- Blackberry messenger (although has been buggy for last few days)
- SMS for non-BB pals (how did I ever SMS before full keyboard?)
Used to carry Palm and cell phone. I'm always typing on this thing, and I know it distracts people, but it keeps my life in order!