1. "well i would start on activities you actually like to do..." In response to Reply # 0
like bicycling, tennis, swimming...do you have an activity you actually like to do? if it's swimming, then i'd suggest doing that once a week for a month, then doing it twice a week, and so on so forth to build up momentum and to train yourself into going to a gym for exercise. If it's something you like, you're more incline to do it more often.
Then because you have back pain, i'd suggest getting involved in yoga. It's a great way to stretch and relieve pressure on your back and other aches PLUS you can do it at home. between these two items, it will start you to thinking about exercise and will get you into a habit of doing these things. Then you can start adding other work outs or exercises.
i think it's hard to start cold turkey so starting with something you like to do is always easiest.
2. "what does your commute look like?" In response to Reply # 0
are you able to use public transportation or walk or cycle (upright) to work? someone asked me the other day how i get motivated to cycle to work. well, 1). i love doing it, i love being outside, it's good exercise, and add an ipod, and i'm in heaven...but 2). if i don't cycle, walk, take the bus or train, i'm not going to have a job. i don't own a car, and i really don't want one because i hate driving. :/
basically, get active and just build on it; incorporate physical activity into your lifestyle.