You need to relax often to control your blushing problems. Relaxing and not thinking too much of the situation at hand will ease the blood vessels and you will not blush. When you are in certain situations make sure you calm the body down and think about what you are doing before you do it.
If a certain someone always makes you blush, think of them as someone else and picture another face as theirs. It will help your blushing problem, and will let you feel more controlled in the environment. Be sure to make it a point to control the conversation and not let them talk about themselves as you will think more about them.
The best kind of control is mind control, if you can control that you don't have to worry about anything else. You can literally think about whatever you want and not worry about blushing. It is a great feeling and will help you have success in whatever you do.
Blushing is in all in the brain and, if your brain acts up, you will blush and can become a chronic blusher. This is a hard habit to break, but can be accomplished with some hypnosis techniques and self-discipline. Learn to hypnotize yourself into not thinking about blushing and you can do fine. Anyone anywhere will respect you, and you won't have to worry about impressing them and your terrible blushing problem. By putting these tactics into action you will see great results for years to come!