Happiness relates to satisfaction for me.
So, in my life, I do not pursue things that are beyond reach. I am sort of down-to-earth person. I love reading and research for truths. Everything I do is achievable in life. When I succeed in doing what I want in target, I have the thrill of joy injected into my vein and the excitement is great.
I am always doing something in life as step by step. So, whenever I achieve my goal, it is a sort of happiness to me. It gives the best satisfaction in happiness.
Don't go and chase after something beyond your means as it will not bring happiness. Try something that is achievable and when you get it, you will feel the happiness in you.