My theory is that if you can look back on your life at any time and the majority of it has been fairly decent or at least mostly content, then that is about the best you can ask for. Being a human animal, you can never guess what things you may go through or what may happen and for the emotional side of things, you can't control what others do and people WILL do things that don't make you happy. That's life.... there is just no such thing as a perfect one, but I do think we should all purposely try to find as much happiness as we can along the journey.

I think trying to help add some happiness to the lives of those around you is a good idea too. You simply can't do good things for others without it giving a little happiness back to you.