The last time I was under 200lbs, I'd gone vegetarian and was walking up hills and stairs every day, with an occasional bike ride thrown in for good measure.
I'd love to go vegetarian again; it really seems to work very well for me, but DH is a meat-and-potatoes kind of a guy and I'm not a short-order cook, so we have to work together for meal-planning.
Also, I felt better if I had a consistent workout schedule, like the one I had before I got married - I'd joined a gym that had group classes, several of which I really liked (including one that combined small freeweights, step aerobics and yoga moves) and a pool. On non-class days, I'd swim laps for up to 45 minutes.
I kept the gym bag in my car on my front seat so I'd have it in my head that I was going to the gym after work, and the gym was immediately on my way home from the office, so I had two reminders before the turn to go home came up.
I miss that gym!
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Liz
DD (3/2010)
"Make mistakes! Get messy!" - Miss Frizzle