1: Don’t violate company policies

2: Don’t log instant messages

3: Use encryption for private communications

4: Don’t trust everything to encryption

5: Don’t bring your private encryption keys to work

6: Protect your private IM and e-mail passwords

7: Don’t store browser history or Web site passwords not directly related to work

8: Use encrypted proxies for private browsing

9: Don’t store the sole copy of anything important at work

10: Never give your employer reason to distrust you

via techrepublic