I'm just getting started with trying the habits in ZTD as a better way of keeping focused day to day. I already had 1 and 2 pretty much down, so it's 3 that I'm working on now.

I find that I can't really use Omnifocus for that, it's more the repository of all the tasks I'm tracking. So what I've done is create a template in one of my text apps (I use VoodooPad but anything will do) that looks like this:

GOOD MORNING!
Here is what you were planning to do this morning.
And then a list of the 3 MITs for the day.

I do this the night before, and I put the text in like 48pf font and leave it on my screen so that it's the first thing I see when I sit down the next morning.