1. Following your own agenda
2. Voicing negative thoughts

3. Complaining to Human Resources

4. Being too smart:
5. Not knowing when to jump

via seattlepi

pic fistfuloftalent

1. Tasks are not clear.
2. "Build it and they will come."
3. Not understanding the problem before buying the technology.
4. Automating "bogus" work processses. 
5. Failure to effectively "market" the new system.
6. Not training the leaders. 
7. Ignoring stakeholders.
8. "If you only have a hammer?"
9. Invoking the security god.
10. Forgetting that "people pay attention to what the boss pays attention to."

via techtarget

1. Failure to take ergonomics into consideration.

2. Lack of planning system.

3. Setting up the office in a wrong location.

4. Lack of dedicated space.

5. Inappropriate furniture and equipment.

via powerhomebiz

1: Misspelling a name

2: Mispronouncing a name

3: Commenting on a personal/family photo

4: Asking about pregnancy

5: Asking about unseen/absent spouse

6: Referring improperly to your boss

7: Failing to reset a voicemail greeting or e-mail autoreply

8: Leaving a departed employee in voicemail / on the Web

9:  Correcting the boss

10: Displaying disunity in public

via techrepublic