Yeah, it mostly boils down to "eat less, move more". A 70-year old friend was unhappy at how easily he tired walking around Montreal on a visit and started walking the track at the local community center and changing his diet (heavy in starches and comfort foods). So far he's lost 30 lbs. and wants to lose 30 more.
If you need to lose weight- think about how it feels if you pick up something heavy (like a 40-lb. grandchild) and walk around. You breathe harder, you feel it in your hips, your back, it's harder on your heart.... it's a burden 24/7.
I found an exercise video that works for me- the people in it are 30-somethings so I can't quite keep up with them, but it's mixed cardio, low-impact. It includes some jumping around, which is good for balance, too.