Avoidance of partially hydrogenated oils found in many processed foods, and avoidance of butter are both wise. Soy protein has also had a lot of favorable news recently. Beans and peas are inexpensive, especially when bought in dry form. The cheapest way to buy soy protein, other than soybeans themselves, is TVP or soy flour. Powdered soy milk is also inexpensive and available.
Alcohol is also a very major cause of interpersonal violence and family disruption.
However, many studies show some decrease in heart disease and increase in longevity after the age of 45. The optimal amount appears to be 1-2 drinks per week beginning after age 45. However, many other things besides alcohol decrease heart disease and whether someone using many of these others would also benefit from alcohol is unknown. Coffee helps depression and may help prevent Parkinson's disease, but may increase rheumatoid arthritis and some other illnesses. While it may help some depressed people, it also aggravates anxiety for others.