The best shape I've been in, in my life, was when I was following the FBI physical test. I've never really been into weight lifting, so I likely won't clog up this thread. Personally, I've found that just running a lot won't really get me to lose weight anymore. Not at the pace I run anyway. I think that minimum weight lifting (even if it's my own body weight) would be enough to get me over the bump. Final comment, I've been running for a few years, but now that I taught my daughter how to ride a bike, and dragged my wife out for a bike ride, everyone finally realized how much fun it is to go as a family. I can't tell you how excited I finally am to be the slowest one.
EDIT: Belly, I really like that workout you posted. May have to try it. Anyone ever tried incorporating a pull-up into a burpee? Really burns you up I bet.