I find that after finishing a big meal sitting up straight and rubbing my (upper) stomach with my hand often prevents indigestion and helps me burp up all the gas that unavoidably gets swallowed when eating. Then I'm less likely to suffer with an upset stomach later. I feel like rubbing my stomach straight after a meal is like a good life hack for IBS, though it might not work on everyone.
Even in restaurants I sit up straight and rub my stomach until I burp. It feels good and it seems required now.
Has anyone else tried this? It's a self-massage to help a large meal go down and for gas to come up comfortably.