To create new habits use baby steps

Let's consider exercising. Exercising is good for you, but exercising is hard to do. It consumes your time and energy. It is recommended to have an aerobic exercise for two hours per week.

The main idea is to start with small and gradually increase exercise. For example, you could start with exercising for 3 minutes each day. Do some stretching, one push up, a little bit of running and jumping around (search for info on the Internet and consult your doctor about exercising). You will certainly be able to find 3 minutes each day and exercising for 3 minutes is not that hard. At the beginning there will be no much exercising and effects, but idea is to start a new habit.

After one week or so, increase exercising to 4 minutes per day (that would be 28 minutes per week). Increase exercising for one minute after each week. After one month you should establish a new habit, and you will exercise 7 minutes per day (or 49 minutes per week). After four month you will exercise about two hours per week or (about 20 minutes per day)

Remember: start will small and gradually increase. That is what babies do and walk and run after several years perfectly.