Teejay,
Lots of good stuff already mentioned here. I just wanted to add my 2 cents. A very wise person has helped me understand that happiness is about being true to yourself. It's not about how much money you have or don't have, whether your life is simple or not, whether you are a JW or not... It's about YOUR passion in life, whatever that may be...
If other things keep you from doing what you want most in life, you will not be happy. If you are doing what you want most in life, despite the minor set backs and trials and tribulations that life drops on us, you will still be happy. This happiness will help you get through lifes trials and tribulations.
We must all ask ourselves what our true passion in life is and follow through...
"We would not refuse to treat one as a brother because he did not believe the Society is the Lord's channel... There should be full liberty of conscience." -- WT April 1, 1920, p. 100, 101