Rinse your mouth after every meal, even if you eat out. This is good for your teeth.
Whatever you do, don't sit still for a long time. Stand for a while if you can, so that your waistline won't grow too fast. Choosing vegetables at home, watching TV and washing dishes are all good opportunities to "stand and be punished".
Drink more water consciously anytime and anywhere, and don't bother to go to the toilet.
There are many things about a healthy lifestyle on the Internet.