Take walking breaks from work. Briskly walk 7-8 minutes in one direction and then turn around. The average walker can walk one mile in 15 minutes. Try to walk during a lunch break, eat and then return. It will often be more convenient than trying to park a car.
Busy people can often find time to cook healthy meals on their days off.
Make extra servings of food like low-fat soups, salads and breads. Freeze extra servings of soups for a later date when you might be too busy to cook. Salads and vegetables will stay fresher longer in sealed plastic containers with an adsorbent paper towel placed inside. Take breath breaks. Many of us are shallow breathers and are not getting the oxygen we need.