Remember the saying "From the acorn grows the mighty oak" - anonymous (the most quoted author in the world).
* Break a big goal into small steps. If you plan to increase your physical activity, start by taking one 5 minute walk 3 times per week. Then start walking a little more often. Then increase the time you are walking. Remember little steps to reach the goal. Some people will get a dog. Taking it outside for walks and playing with it is a great way to get exercise without feeling like it is exercise.
* Make changes that you can stick with. The changes you should make are those you can keep for the rest of your life. It is a lifestyle change. For example, many people go on a diet to lose weight then stop the behavior that led them to lose weight and guess what..... within a year or two they have not only regained the weight they lost, they gain even more. Why?........they did not make a lifestyle change.