Convenience vs breach
Termination for convenience lets either side walk away with notice, sometimes with a fee. Termination for breach usually follows a cure period for the problem clause.
Notice symmetry
Check whether both parties get the same notice period. A seven-day exit for the client and thirty days for you is one-sided.
Work in progress
The contract should say what happens to completed work, work in progress, and deposits if the deal ends early.
General information only. Not legal advice.
Review your contract