I have a upset stomach because I was drinking liquor last night--what food is good to eat?

Upset stomach. You may have caused yourself some alcoholic gastritis from your drinking. Keep your food very simple -- like broth and crackers or rice, even. Baked potato. Applesauce & bananas are easily digested and add pectin for bowel function. If you can find it, papaya for the enzymes. Herbal teas, like peppermint, chamomile, and ginger, may help soothe your stomach. Rehydrate with lots of water.