Samuelemouse

I agree with dust. Get some exercise. Strenghten especially your abdominal muscles. Avoid the food that is bad for gas. Avoid alcohol or too much of it. I've posted some tips for you below which I found somewhere. But no good if you do not follow the advice. If that does not work, try seeing a doctor but those sorts of problems are notoriously hard to pin down.

10 Tips on Belching, Bloating, and Flatulence

Belching is caused by swallowed air from:
Eating or drinking too fast
Poorly fitting dentures; not chewing food completely
Carbonated beverages
Chewing gum or sucking on hard candies
Excessive swallowing due to nervous tension or postnasal drip
Forced belching to relieve abdominal discomfort
To prevent excessive belching, avoid:
Carbonated beverages
Chewing gum
Hard candies
Simethicone may be helpful

Abdominal bloating and discomfort may be due to intestinal sensitivity or symptoms of irritable bowel syndrome. To relieve symptoms, avoid:

Broccoli
Baked beans
Cabbage
Carbonated drinks
Cauliflower
Chewing gum
Hard candy
Abdominal distention resulting from weak abdominal muscles:
Is better in the morning
Gets worse as the day progresses
Is relieved by lying down
To prevent Abdominal distention:
Tighten abdominal muscles by pulling in your stomach several times during the day
So sit-up exercises if possible
Wear an abdominal support garment if exercise is too difficult
Flatulence is gas created through bacterial action in the bowel and passed rectally. Keep in mind that:
10-18 passages per day are normal
Primary gases are harmless and odorless
Noticeable smells are trace gases related to food intake
Foods that are likely to form gas include:
Milk, dairy products, and medications that contain lactose--If your body doesn't produce the enzyme (lactase) to break it down.
Certain vegetables--baked beans, cauliflower, broccoli, cabbage
Certain starches--wheat, oats, corn, potatoes. Rice is a good substitute.
If flatulence is a concern, see your doctor to determine if you are lactose intolerant.
Identify offending foods. Reduce or eliminate these gas-forming foods from your diet.
Activated Charcoal may provide some benefit.