If you are wanting to lose weight, change your diet, or be more active, then building habits may be one of the best ways to do this. All 3 of the methods work reliably across 5 studies, so pick the one you like the most and try it out. If you have any thoughts or concerns, let me know!
Citation: Cleo, G., Beller, E., Glasziou, P., Isenring, E., & Thomas, R. (2020). Efficacy of habit-based weight loss interventions: a systematic review and meta-analysis. Journal of behavioral medicine, 43(4), 519-532. https://doi.org/10.1007/s10865-019-00100-w