Retirement Happiness is Staying Active
Retirement is a time to relax and spend time with your family, as well as do the things that you love in life.
My ideas on a happy retirement would be staying active, playing golf if your are into sports, or possibly going to the gym to workout.
Having extra time on your hands would make a perfect setting to get involved in hobbies, possibly restoring an old car, or even something as little as collecting coins.
At this point of your life you have worked for yourself entirely, why not try to give back to your local community and help others that are in need.
I think all of these things will lead to a happy retirement and positive lifestyle.