I built a freelance career by saying yes. Now, I'm learning when not to.

The author is learning to say 'no' more at this stage in her career. Courtesy of Hannah Howard After getting laid off at 27, I took the jump and went freelance. Over the years, I've said 'yes' to almost all work that came my way. I'm now 39, and the loss of a big client has me rethinking my…