Based on the Purdue OWL job skills checklist these are some skills which I feel are the most important for Entrepreneurs.

1. imagining new solutions
2. adapting new procedures
3. negotiating/arbitrating conflicts
4. speaking to the public
5. writing letters/papers/proposals
6. relating to the public
7. preparing written communications
8. developing a climate of enthusiasm, teamwork, and cooperation
9. taking independent action
10. developing plans for projects
11. motivating others
12. setting up demonstrations
13. locating missing information
14. persuading others
15. selling ideas
16. picking out important information
17. skillfully applying professional knowledge
18. providing customers with service
19. inventing new ideas
20. promoting events