The Zen Habits blog has lots of practical advice for simplifying life, getting things done, and guiding toward activities to make you happy.
There is also a reference to the Happiness Project blog.
An interesting read on happiness is Stumbling on Happiness by Daniel Gilbert.
He busts some common myths about what people think they know about happiness by analyzing research on how the mind really works and doesn’t work.
He explains in the book why people have difficulty imagining and predicting happiness and a better way is to rely on the experience of other people.
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