At IBOLC we provide an “expectations management” portion of our Academics In-brief to new students. I think Shepard’s list above is actually relatively exhaustive. I don’t have anything to add to his list.
So, I’ll focus on some of the “big-picture” lessons from the IBOLC in-brief that will help any BOLC student focus during and reflect after their BOLC experience:

1. Coaches – the trainers are coaches, not necessarily exemplars. BOLC students are fresh out of college, twenty-something, Stanford/USMA/MIT/whatever graduates. The students are well-educated and in their physical prime. BOLC trainers are proven, successful leaders in their respective field. But, it’s neither their job, nor realistic that they be better than all students at all things. Michael Phelps’ coach didn’t show him how to win gold medals by being an Olympian himself, but he was (clearly) still an effective coach. Pay attention to the BOLC trainers’ coaching techniques. How do they establish trust, rapport, and confidence rapidly among a group of young Leaders? Is their technique effective? with everyone?

2. Teachable moments – Every event, good, bad, trivial, is a potential lesson to be learned. Don’t just go to a range and qualify. Don’t just go to land navigation and orienteer. BOLC is not day camp. BOLC is leader development. If you want to use the day camp analogy, then recognize that when you finish day camp, you’re immediately transitioning to become one of the camp counselors! Pay attention to how and why things are done. For the most part, TRADOC ensures BOLC’s are a relatively good example of training resourced and executed to approved standards. When things go wrong, try to ask your trainers to explain the systemic breakdowns that caused the misallocation of ammo or the weather delay. It’s probably more nuanced than you realized, and overcoming those small daily obstacles will be your challenge as a junior leader.

3. Peer leadership/feedback – Peer leadership is probably some of the most challenging leadership. It is a phenomenal test bed for leadership styles. Your learning and development in this regard is exponentially enhanced by soliciting candid feedback from your peers. When you are the Platoon Leader, your Soldiers will be significantly less likely to tell you whether or not you’re doing a good job. Your peers in BOLC won’t have the same hang-ups. You will want to receive feedback from your trainers, too. But, I would argue the feedback from your peers is just as valuable. If there is not a formal system for peer feedback in your BOLC, solicit feedback during AARs.

BOLC is exceptional training! Good luck!