Set a simple, achievable goal for a physical activity of your choice-walking or cycling more than you usually do or learning a new sport;

Determine how you will find the time to reach your goal: Will it be in the evening? Straight after work? When the kids are at school

Have a second plan in case something happens: if the weather doesn't is bad, if another commitment comes up, etc.

Enjoy the feelings of accomplishment and competence you get as you set and achieve your goals.