1) Brush your teeth: It sounds simple. But just brushing your teeth more often will help reduce bad breath. Not only will the toothpaste often mask odors, but more importantly brushing will remove food particles that are a major cause of bad breath. Carry a toothbrush to work and brush after lunch or even coffee breaks. It will help. Your dentist will thank you too.
2) Brush your tongue: It sits right in the middle of your mouth and your breath passes right over it. A clean tongue helps keep your breath from picking up any additional odors from small particles that might have lodged on its rough surface. It's not hard, just one more step in the fight against bad breath. Besides, you're already brushing your teeth regularly, so this won't really take any extra time or effort.
