Avoid stupid people. This can be a difficult one to achieve.

Don't spend too much time at work. I work 20hrs a week.

Don't get involved in the business Gossip and the Politics.

I also walk the 3 miles each way to work (avoids the stress of parking, public transport, traffic lights, other drivers etc) and will usually have a dog or cat come up to me to say hello on the way. The rustling trees and birdsong on my walk is quite relaxing even after a Hurricane force Storm