Intention
What are you here for? Do you have an idea of how this session is going to bring you closer to your goal?
Practice
What are you going to practice during the session? Technique, Mindset, Mind Muscle Connection, Strength, Endurance, Energy Management? The gym is a place to practice the things you'd like to become (the coaches are there to guide you around how and what to practice to become that person).
Outcomes
The outcome of one session should be that you’re one step closer to who you set out to become when you started the session. This could mean “I added extra weight to the bar”, “I nailed every rep perfectly”, “I took it easy when my body really needed it”. Almost all outcomes are going to be (at least) supported and (more likely) defined by what you do outside of the gym. Get your rest, nutrition and stress right and your work in the gym will be paid off.