Always have your client’s best interest in mind but it cannot be at the sacrifice of yourself.
Make commitments you can live up to without encroaching on your life.
Know your limits and what you can and will do.
When we over extend ourselves we set ourselves up for frustration because when we are stretched; going well beyond the call of duty and it goes unnoticed we become resentful and the client experiences it.
The client will be much more appreciative of what you can do when it comes with true willingness.