GERD prevention. Avoid foods & behavior that delay stomach emptying &/or relax the lower esophageal sphincter--spicy, greasy food, mints, alcohol, tobacco, chocolate, tomato-based products, caffeinated & fizzy drinks, eating before bedtime. Lose weight. Elevate head of bed on blocks. Use otc acid blockers for relief (h2's: tagamet, zantac, (ranitidine) pepcid; ppi's: prilosec, prevacid, nexium...).
Caffeine. Different foods create symptoms for different people. Some people it's spicy, my daughter it's garlic, etc. Caffeine containing foods ae very common culprits. Also, avoid over-eating. Try small, frequent meals instead of a big meal. Eat slowly, chew food well.