1. Finding clients. 2. Finding projects. 3. Developing relationships. 4. Managing cash flow. 5. Setting fees. 6. Doing the actual work for clients. 7. Leveraging knowledge and experiences across clients / projects. 8. Attracting work that you continue to enjoy. 9. Managing your time. 10. Managing your energy. 11. Finding new business

Just roughly off the top of my head.