Having been in your shoes as an intern working with loggers here is what I would say.
1. You need to be good at shooting the breeze and building a rapore with those guys. Some it will be easy some you just flat out won't. If you can just talk with em they will remember that and they will be willing to teach you and even if you don't see them for a few years they will remember you, not necessarily your name but your face and what kind of guy you are and will talk with you like it was yesterday.
2. Supporting the above don't go at it like you know everything; I'm not saying you would just be mindful of the possibility of coming off that way. Part of that is using your head about where to park, where to stand, and how you approach the equipment and operators. Always and I mean always stay out of the bite and make sure the guy acknowledges you before walking up. I have the philosophy there are no dumb questions just the ones you don't ask, now we all know there are dumb questions but usually they are asked by people that should know better. Don't be afraid to appear dumb, this is okay as long as you ask good pertinent questions that show you are willing to learn. The guys will answer them but don't come back the next time and act like you are an expert. Common sense right. There will always be a guy that will give you some pushback. If you are going to make a command decision and bring up an issue be sure you absolutely know what you are talking about otherwise you should ask it as a question; and if you are right don't roll over. You do that you will lose respect.
3. Make an effort to learn their job. Maybe not to the point that you could do it but so that you understand what theyt do and why.
4. Common sens. The whole job is about common sense plain and simple. We know it happens but don't shut the end of your flagging or your string box in your truck door and string that stuff everywhere. They'll get a good chuckle and you'll feel dumb. Depending on they guy he will think you are dumb. Had a shovel op tell me a story about that one time. I always made sure I didn't do anything like that the first few times I was on a job. Luckily have never done it so knock on wood.
5. If you can (by this I mean permission from your boss) get down in the rigging crew and set a few chokers. Learn what they do. Or help em set guylines. If there's something they could use an extra hand with real quick and your boss allows, do it. If you're in a small community everyone will hear about it, same as if you're a pompous jerk.