Limit the intake of greasy or protein rich foods. If you eat these types of foods, the stomach starts producing more acid to digest them. The more greasy food one eats, the more acid is produced.
Don't drink soda with meals. Stomach pressure dramatically increases when food is mixed with fluids, especially soda with a lot of bubbles. This leads to the opening of the esophageal sphincter and the release of acid into the esophagus.
Don't drink strong coffee or tea. Strong coffee will put you in a fight or flight condition, your stomach becomes tense, increasing its pressure on the esophageal sphincter. Strong tea slows down your stomach and intestinal movement, so the food stays for a longer time, causing indigestion and increased stomach pressure.