We identified smartphone usage patterns predicting overuse and developed an intervention to reduce these effects. In Study1, 54 undergraduate students reported their daily screen time and the reasons for their smartphone use. A cluster analysisrevealed two usage patterns: as a tool (e.g., for directions), and to socialize or pass time. Only the latter pattern correlatedwith daily phone use (r=.35). In Study 2, 28 pilot participants underwent a two-week-long behavioural interventioninvolving disabling non-essential notifications and keeping their phone out of reach when not in use. All participantscomplied with these guidelines, leading to a 1.2 hours/day reduction in usage (4h to 2.8h), a decrease in smartphoneaddiction scores to normal levels, and a 30% decrease of scores on the Beck Depression Inventory-II (10.1 to 7). Weexplore potential cognitive benefits of the intervention on memory and attention (measured by Operational Span andSustained Attention to Response tasks).