what you want to start first

1. ActiveSync
2. Calculator
3. Calendar
4. Contacts
5. Inbox
6. Internet Explorer Mobile
7. Media Player
8. Messaging
9. Mobile Office (including Word, Excel, and PowerPoint)
10. Notebook
11. Pocket Outlook
12. Pictures & Videos
13. Settings
14. Tasks
15. Today Screen
16. Voice Notes
17. Windows Media Player
18. Windows Mobile Device Center (for synchronization with PC)