The worst mistake you can make when starting out exercising is to pick a routine that is more work than you can handle.
Of course you will be excited starting off, and sometimes this will make people pick a very hard, intensive, exercise regime. Often this program won't include any activates they enjoy.
The result is that they burn out quickly and quit exercising altogether because they can't keep up their chosen exercise routine.

  This is something that you should make sure that you don't do. Any exercise is better than no exercise at all, so if all you feel up to doing is walking, then you should walk.
Study after study has shown that even people who do only twenty minutes of exercise as little as three times a week have better health than they would otherwise.

  Once you get into the swing of your routine you will probably want to step up its intensity somewhat, but ensure you don't fall into the old trap of stepping it up too much. Say you enjoy riding a bike and you cycle a short distance every second evening, once you become used to this you will find you are able to cycle further, quicker and for longer. At that point the best plan is to stretch your routine to encompass your greater abilities, retaining a challenge when you go cycling.

  Perhaps you already get some exercise every day and you feel confident and happy with your ability to complete your designated exercise. You should consider stepping up your exercise program - exercise more and do it more often. For example if you go for a short walk three times a week then try to find the time to do the same walk four or five times a week.
Try to vary your exercise also, this will help avoid boredom. If you become bored doing your exercise then you will begin to get sick of it. So liven it up by doing different exercises.

  An exercise routine which trains all of your body is obviously a good one, so maybe you should look into getting a membership in a local gym or perhaps buying a body workout machine for your home. By getting a total body workout your whole body will feel, and look, better.
Don't allow yourself to get discouraged; you won't always be in the mood to exercise. If you don't feel like exercising, then just take that day off. There is no harm in missing a day's exercise here and there, in fact it can help you prevent become burned out. Just try to ensure the day off doesn't become a permanent break.
The reality is that most of us are not happy with our physical state and we are looking for solutions. We are not only looking for solutions, we are actually paying for them. This creates the natural demand for physical fitness programs.

  The variety of physical fitness programs does not indicate that one method is better than the other. Like neither is Coke better than Sprite nor Sprite better than Coke. It's a matter of preference and either one of them could quench your thirst. Variety is good. It gives us the freedom to choose.
In spite of having a good supply of effective fitness programs and variety, I think the failure to benefit from such programs lie in us. We are not organized enough or do not have the time to practice them. Because of our work and careers the time investment becomes difficult.
  Take a dance class or similar activity. They can be fun and you work of pounds at the same time.