What is the single most important thing you can do at the gym to ensure that you will continually get bigger and stronger? It’s very simple. The most important thing you can do each and every single time you go to the gym is try to set a PR (personal record) on every lift you do. That’s it. What this means is that you should always be trying do either do more reps with the same weight (within reason, any sets above 12 on most upper body exercises and 15-20 reps on lower body exercises… continue reading.