What things can I do to treat GERD at home?

PPI's. Stands for "proton pump inhibitors". These are drugs that turn off the acid producing cells in the stomach lining. Omeprazol is often used.
GERD home remedies. 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, zegerid). See a GI doctor if persistent.