The idea with getting up earlier is that, assuming you're able to get up to do it, you'll get it in that day. If you leave it for the end of the day, or even after work, you might not. I know I've had many days where I've come home from work completely drained, and can't really get myself to do much more than reheat food for dinner. I'd be willing to wager I'm not alone on this.
Not at all :-) What helps me is having enough variety in what needs to be done - coding, marketing, management, planning - that there's always something I'm not totally burned out on.
