I do wish I had a pull-up bar somewhere on my property.
Ideally you would have one in the house, in a doorway that you walk through each day. I heard one guy say that putting up a pull-up bar like that, and doing a pull-up every time you walk past (or thereabouts) does WONDERS for the bod.
And that's what everything boils down to - figuring out how to get more reps in.
You can read that guy's latest here.