This is not a self help book. The author points out that we are woefully unimaginative about predicting our future happiness. With lots of humor and many controlled happiness tests, the author relates that we "stumble on happiness". It isn't planned no matter how hard we try to create a happy future. The author explains that we err when we recall what made us happy in the past. Based upon those errors of past happiness, we are destined to repeat an erroneous imagined happy future.
Making this a personal issue.... Long term readers of the words from the Wandrin blogs have seen the occasional thoughts about stopping the nomadic travel and making a long term commitment to living some place -- an RV park or an apartment. That settled existence will make me no happier than my nomadic travels. I know that. So the solution is to enjoy what is -- where ever that may be. For me it is living in the moment. There is the past and there is a future, but for me it is the present. Enjoy it.