Regret can increase stress and negatively affect one's physical health. JGI/Tom Grill via Getty ImagesA friend of mine – we will call him “Jay” – was working for IBM in New York City in the early ‘90s. He was a computer programmer and made a good salary. Occasionally, competitors and startups approached Jay to join their companies. He had an offer from an interesting but small organization in Seattle, but the salary was paltry and most of the offer package was in company shares. After consulting