How to be healthier (without a workout)

This year I have noticed that I am becoming very unhealthy. I'm not overweight I'm just not eating like I am suppose to. I have always had a sweet tooth and that can cause some problems.
Recently I have been choosing to eat more vegetables during my meals rather than a lot of meat and/or potatoes. In the mornings, I eat some yogurt, a banana, and some OJ and bring a snack or 2 for the day such as a protein bar or an apple. For lunch I pack a sandwich with whole wheat bread and fruit. I am finding that by eating healthier I have more energy and a more fulfilling lifestyle.