One of the hardest lessons to learn as a freelancer is how to juggle the ebb and flow of available work. This dynamic sometimes pushes freelancers to seek more work during a quiet time than they can handle during the busy times.
It is also hard to tell when a freelance gig has reached its end-of-life. Sometimes I've pulled the plug and other times the client pulled the plug, but the nature of contract work is that it will end. And no matter how much you like the work, the project is over.
This is why continuously updating your skills and staying connected helps you in the marketplace. How do you keep expanding your freelance circle?