If you are like me and have spent most of your life sitting on your butt then when you decide that it's time to start an exercise regime you have to remember to start slow. You don't want to over exert yourself and end up causing more damage than good. Start with something simple.
If you decide that you want to go the professional route and workout at a gym you can talk to the professional trainers there and they can start you out with something slow and up to your speed.
If you have decide to workout from home, start out with simple things such as going for short walks or looking up a few exercises that you can do from home. Just go to your brower and type in, "Simple exercises" and see what sites come up and which ones sound the most interesting for you. The more you do these exercises, the better you will become at them and the more physical exertion your body will be able to take.
When you first start your workouts the exercises might seem difficult to do but the more you do them the easier they will become. You want to start off really slow, maybe only 10 minutes a day and then add another 5 minutes or more reps every week.
You can look up exercises on sparkpeople.com. They have a lot of wonderful information for those of you just starting out. Believe me, when I first started working out, I thought I was going to pass out after only a few minutes, but now however just last week I decided to try the "Turbo Jam" DVD workout and on my first try I was able to do the entire cardio workout! Boy, was I proud of myself! Adding exercise into your daily routine will show you such an amazing change in your body in a short period of time. You will be able to do things that you could never do before and you know that you are making your body stronger and healthier!