"Are we working you too hard?" said the client after our second 11 hour day, after I let slip I was a bit wiped. "Oh no, I'm working myself too hard." "Well, I've never worked with anyone with as much energy as you've got."
It sounds like a cliche, but being a pro means being fully present for as many hours as it takes, and then some. I'm a big believer in fulfilling what I promise, then over delivering. I am never not shooting for myself, and I'm as harsh a critic as they come. If it's good enough for me, then chances are it's above and beyond what the client needs. That pretty much sums up my business mission statement.