My coworker asked me to take on her report the night before it was due, and a year ago I'd have said yes and hated myself the whole night. This time I just said I can't take that on, and I didn't spend an hour explaining why. It felt strange not to feel guilty. My yes means more now, because people know my no is real.
More people experience this than they realize.
You can hold a clear limit at work without drowning in guilt.
If this sounds familiar, the Library can help you find the bigger picture.