I've been working out consistently for my entire adult life.
I switch it up but at the moment I do a half hour on the cross trainer, really pushing my heart rate up and listening to cheesy music on the IPod.
Then I do two sets of ten reps on eight different stationary weight machines.
I do that three times a week, or more if I feel like it.
I also ride a bike now and then, hike on weekends, and fidget, which uses up calories at work and on the train!
My weight went up some and I lost eight pounds; I'd like to lose about five more. When that happens, I up the weight on the machines I use, and watch my eating habits.
But the exercise isn't really a weight-loss thing for me. It helps me sleep, keeps my metabolism up, melts stress and makes me happy.