One other thing you get a lot of advice about as a new professor is how to run your show.
"Don't spend too much time on teaching"
"Write every day"
"Don't take too many grad students your first year"
The thing is, like anything, do what works for you. You want to spend 14 hours on making Teh Perfect Slides for your first class, do it. You want to get up at 4am and start writing, go for it. Want to relax all weekend playing Facebook games while occasionally picking at your grant proposal, sounds grand!
The trick is to know what makes you happy and know your own style, and work that way. You have a lot of flexibility in your schedule, the trick is figuring out how to best structure it so you're most productive. And to factor in recharging time, for whatever that means for you.
