How Do You Handle the Stress of Investing?

How do you handle the stress of investing and trading well? And again, this just suits my personality. Because a lot of my ideas are longer in nature, it helps me to block out the daily noise. If there's a crappy day in the market, yes, i can understand where it's coming from. But if i don't feel like it impacts a particular idea of mine, ou now, then i just say, i cajust in a chalk it up to a bad day.