Alcohol: Limit your consumption of alcohol as much as possible. Processed carbohydrates: Avoid foods high in carbs, especially processed carbs, such as refined white flour found in pastries, bread, white bagels, flour tortillas, biscuits, etc.; white rice; regular pasta; instant oatmeal; potatoes; and sugary cereals. Large meals: It’s better to stick to smaller meals eaten more frequently throughout the day, as large meals can cause your blood pressure to plummet.