Stress is a major problem and can cause all sorts of health problems. Small business owners have it worse than the general public. Studies show, small business owner's stress is two to four times higher than non business owners.
Life is stressful, so you're not going to eliminate stress completely, but there are certain stress relievers you can apply to reduce the amount of stress you experience with while running your small business. I've found that many small business owners get stuck in what I call the "stress cycle" which keeps them stressed and prevents them from truly enjoying their business.