2. Sync your iPhone and may Jailbreak it.
3. Backup your shsh blobs to cydia and local
4. Apply for a bumper or case (iPhone 4)
5. Have your iPhone protected either with case, bumper, screen protectors or together
--------------------------------------------
Thats all for normal users
--------------------------------------------
For Jailbreakers:
6. Go to Cydia and complete the upgrades
7. Add Source http://cydia.hackulo.us and install appsync, installous
8. Install OpenSSH and OpenSSL
9. Change the root password to prevent being hacked
10. For other recommended tweaks, click HERE