I've learned so much from Matt Keller over the last year or so. His teaching about "taming the monster of Sunday" has helped me so much and since our church launched a few weeks ago, I've been able to operate with a good amount of margin in my schedule.
I've asked all our leaders to operate by the "Thursday Midnight Principle". Very simply, if we all went to sleep Thursday night and somehow slept until Sunday morning (sounds good, huh :), we would still be ready to have church. By Thursday at midnight (or before) the service and worship order is set, the band has rehearsed, the sermon is written and rehearsed. In short, we're ready on Thursday for church on Sunday.
It's not a fool-proof plan because the unexpected things in life happen, but generally speaking, it sure makes Friday and Saturday a whole lot more enjoyable and flexible.
Margin . . . with your time, finances, relationships, anything you can think of . . .. makes life so much more enjoyable.