In his phenomenal book "The Power of Habit: Why We Do What We Do In Life and Business," Charles Duhigg dedicates an entire chapter to what he labels the "habit loop." Without giving away any spoilers—I'm not kidding, it's a book that will melt your brain, and you should read it—Duhigg explains that one of the most fail-proof ways to create a habit is to preface the behavior you want to reinforce with a cue.
Transformations have both physique and performance dimensions, so it's OK to have goals in both areas. Losing weight, gaining muscle, and looking good in the mirror are examples of the former; squatting 10 more pounds, running a mile in under 10 miles, or finally getting your toes up to that bar are examples of the latter. Having both types of goals will help keep you motivated even if one goal starts to slow in progress.
For every person who lifts weights these days, it seems there are two who have a podcast about it. There are more bodybuilding tips promising greater strength and muscle than ever before, and along with them a ton of confusion; one buffed-up Instagrammer says lifting heavy will get you swole, while a well-known fitness personality has claimed in recent years that two 30-minute workouts per week netted him 34 pounds of muscle in a month.