My advice:
1. If taking PPIs long term, please monitor your renal function and creatinine regularly as incidences of acute interstitial nephritis have been reported

2. I've encountered a case with painful gynaecomastia after prolonged intake of PPIs.

3. Food to avoid (on top of all that's been suggested) - alcohol, caffeine, "lemak" food, and smoking. Eat frequent small meals.

4. Lose the tummy (if present) and / or tight jeans - they cause increased intra abdominal pressure which may delay gastric emptying and cause more reflux.

5. Focus when eating - the gastrointestinal tract is lined with smooth muscles. Smooth muscles are controlled by the autonomic nervous system, which is beyond our control. But what's on our mind affects the motility of the stomach and the intestines.
I.e when you're munching on something while rushing through your work, your body is in sympathetic overdrive which slows the gastric motility, but the gastric needs to work to digest the food you're munching, so, go figure.

6. De-stress - Similar to No.5, stress hormones put your body in a sympathetic state. Even a short walk does wonders. I find a lot of people who are under stress do not know that they are in fact stressed.