From Gallup Organization Research, as reported in First, Break All the Rules.

Based on interviews with over 80,000 managers, it was determined that the core elements needed to attract, focus and keep the most talented employees could be simplified down to the following 12 questions:

1. Do I know what is expected of me at work?
2. Do I have the materials and equipment I need to do my work right?
3. At work, do I have the opportunity to do what I do best every day?
4. In the last seven days, have I received recognition or praise for good work?
5. Does my supervisor, or someone at work, seem to care about me as a person?
6. Is there someone at work who encourages my development?
7. At work, do my opinions seem to count?
8. Does the mission/purpose of my company make me feel like my work is important?
9. Are my co-workers committed to doing quality work?
10. Do I have a best friend at work?
11. In the last six months, have I talked with someone about my progress?
12. At work, have I had opportunities to learn and grow?