Eating and drinking. Properly should prevent hemorrhoidal flares. A good hi fiber diet and 80-100 oz of caffeine free, alcohol free fluids daily should do a body good as far as the hemorrhoids are concerned.
Fiber! Hemorrhoid disease is a byproduct of straining with defecation; adding fiber to your diet, supplemented with at least 64 ounces of water/day may be very helpful. Also, it is best to "take the library out of the bathroom" and get in-and-out as soon as possible.