Eat balanced diet: Good food is medicine on its own
Eat less of/avoid sugary foods/drinks: Those microbes that destroy the teeth dwell more on sugary matters
Drink water often: Dry mouth worsens bad breathe (mouth odour)
Brush (preferably after eating) at least twice daily
Avoid smoking/tobacco use: Smoking/tobacco use increases the risk of oral cancer, gum diseases, as well stains the teeth
Floss regularly: To remove particles hanging between teeth
Brush your tongue well: Tongue is part of the mouth
Brush the gum & tongue gently to avoid wound
Don’t use hard brush: Life no suppose hard reach that level
Brush with salt, water & chewstick if fluoride toothpaste & brush are not available: They both work almost equally efficiently
Gaggle with warm water & salt from time to time
Replace old toothbrush with new one within 3 months: I guess you know why
If you wear braces or dentures, keep to rules your doctor gave
Don’t forget! Bad breath (mouth odour) is treatable
Misaligned, jagged, stained teeth, etc are all correctable, with your smile restored
Avoid eating/chewing hard things that can crack your teeth/injure your mouth
Create time to visit your dentist, at least annually: Don’t wait till your teeth start getting holes or palates ulcerated before you do that
Neglect these things at your own peril.