Want a simple way to cut your risk of a heart attack or stroke? Eat fish. There are few things you can eat that give you so much bang for the buck. Eating fish just twice a week may reduce the risk of heart attack or sudden cardiac death, and eating fish more than once a month may reduce the risk of stroke. The American Heart Association recommends eating oily fish at least twice a week. It's best to eat smaller fish such as salmon, mackerel, herring or sardines. (Fried fish should be avoided because of the unhealthy kind of fats found in fried foods.) Chunk light tuna also is fine because of its healthy fat content and because it typically has lower mercury levels than albacore or tuna steaks.