Article Source: CNN

(CNN) -- Gretchen Rubin says she hasn't created any new secret to happiness, but her test runs of the advice and research findings of others has resonated with the readers who've made her a best-seller.

In "The Happiness Project," published in January, the writer and former clerk for Justice Sandra Day O'Connor tells how she read about what scientific studies, philosophers and others said about finding happiness. Based on that research and her desires, she crafted resolutions that she tried over the course of a year.

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