Deliver Quality Work
I feel like I suffered from this on the early onset of my career. I was saying yes to everything that came my way, damn any timeline or budget I said “yes” to it. And the work reflected it. Now I am realize over time that I can say no to things, or negotiate budget or timeline perimeters and more times than not the client will meet you halfway (at least the ones I have haha). Learned by doing that I have more time (thats agreed upon) and budget (thats agreed upon) to produce quality work, when they need it. Hence retaining the client(s).