Just have a positive outlook on life and mostly good things will happen, also never dwell on things that you could never gave helped or avoided or worry about things you have no control over...
An example, i had done a deal with a very good friend on here to buy one of my cars for more than I could get as a trade-in. Then 2 days before he was due to pick it up the gearbox decided to fall to bits!
Instead of thinking crap what am I going to do, my first thought was that I was glad it happened before I sold it to said friend. In the end he still took the car for what I would have got as a trade-in, if in running order so all turned out well in the end.
Also another of my tips is to avoid politics & religion, both completely useless and only achieve arguments and in extreme cases war....