How about: care. So many techs are looking forward to payday just to get hammered or get the hell off of work. Care about the trade. Care about the equipment and customer. Write down part numbers from some of the individual parts and pieces and then look them up to see how they work. Ask very specific questions about a very specific part to learn about its job/role in the machine. And last but not least: shut up. When the lead tech is talking...you shouldn't be talking. By shutting up, you might just find out that the lead tech is a liar or doesn't know crap....and that is good information to know too.
"Right" is not the same as "Wise".
Don't step on my favorite part of the Constitution just to point out your favorite part.
Just because you can measure it, doesn't mean it is important. Just because you can't measure it, doesn't mean it isn't important.