Deglycyrrhizinated licorice (DGL) or ginger seem to be common methods for treating acid reflux. Licorice stimulates the production of protective mucus that lines the digestive tract which protects the esophagus from stomach acid. Ginger relaxes the muscles on the esophagus walls to prevent acid reflux.
For the DGL, take two 250-milligram capsules before each meal. Rather than swallow them with water, simply suck on the capsules so that they dissolve in the mouth so that when you swallow it will coat the inflamed tissues in your throat and esophagus.
For the ginger, take two capsules twenty minutes before eating. Or, alternatively if you are using ginger root or powder, you can make a tea and drink that. One recipe for the root/powder method involves 1 teaspoon of freshly grated ginger root, or 1,000 mg of ginger powder. Steep the ginger in 1 cup boiling water for 5 minutes, and then sip.
It is also mentioned to stay away from milk, coffee, alcohol, peppermint and chocolates. As for other foods which contain some acids, you'll have to see for yourself which you can handle or not. Also try not lay flat on your back, elevate your bed slightly so to discourage the acid from moving up.
I hope this helps.