Can people choose to be happy? To date we have no definite answer to this very old question. In this paper, we introduced and tested a new theoretical model of the pursuit of happiness in which we integrated individual happiness definitions, happiness-related intentions, and happiness-enhancing activities. Further, we tested different characteristics of happiness-enhancing activities that have previously been discussed in the literature as potentially relevant for the successful pursuit of happiness: the breadth (i.e., how many different facets of happiness are positively affected by one single activity), variety (i.e., how many different happiness-enhancing activities people conduct in daily life), and frequency (i.e., overall number) of happiness-enhancing activities. The results of an experience sampling study ( N = 473; 2815 daily-level data points) support our preregistered hypotheses: Individual definitions of happiness were predictive of intentions and well-being related behaviors in everyday life. Further, the engagement in broader and a higher number of happiness-enhancing activities was associated with higher levels of daily well-being. The variety of happiness-enhancing activities, however, did not predict daily well-being. Overall, we demonstrated that defining and pursuing happiness in a multifaceted manner is related to higher levels of well-being.