This document outlines principles for effective goal-setting programs to motivate behavior change. It discusses targeting the right users, either high-risk consumers just starting a behavior change or healthy strivers looking to optimize further. Goals should harness intrinsic motivation through a sense of purpose and mastery. Goals also need to be achievable but challenging. Focusing users with a primary and secondary goal increases likelihood of completion. Creating commitment involves giving users autonomy in selecting goals and establishing trust in the source of recommendations. Sharing goals and progress socially further increases motivation and accountability.