Preventing Bad Breath
Don’t smoke.
Take care of your teeth and gums by brushing at least twice a day and flossing before you brush your teeth at bedtime to remove all of the food particles and reduce the plaque levels in the mouth. Clean your mouth after eating/drinking milk products( including milky tea etc.) Brush your tongue every day to remove dead cells and food particles. This can be difficult at first but you can train yourself to be able to clean the tongue further and further backwards without feeling sick.

Use a mouthwash such as Listerine or Plax to reduce the level of plaque in the mouth.
Drink plenty of fluids avoiding too much coffee.
Chew sugar-free gum particularly if your mouth feels dry.
Eat fresh fibrous vegetables.

Visit your dentist regularly to ensure that any problems which are starting are promptly attended to. Your dentist may advise visiting the dental hygienist for regular scaling and polishing. This is a proven preventive measure to reduce gum problems and tooth decay.