January always arrives with that peculiar cocktail of hope and lethargy: the eagerness to be better mixed with the deep, gravitational pull of the sofa. After weeks of festivities, the desire to reset our bodies is real, but translating that into action is much harder. The Guardian's journalism is independent. We will earn a commission if you buy something through an affiliate link. Learn more. Motivation ultimately lives in the doing, not the daydreaming,