DON'T be the person that always 'informs' the NM about someone slacking off, not changing her tubing by the time the clock strikes the next hour, or coming in late. They already know this, and YOU, as the newbie, just labeled yourself a Tattle-Tail.
DO ask GOOD questions. While they say "there's no such thing as a Stupid Question", I can assure you that if you ask a question because you are too lazy to look in the most obvious place possible for the answer, you WILL be glared at for asking said stupid question
Think on it for a little bit; if you cannot find where the answer lies, please DO ask. No one wants you to stay ignorant
DON'T assume the nurse before you cleaned up everything before she left. DO assume you need to find out from each patient, immediately upon receiving report, if they need pain/nausea meds, or a bathroom trip, or something similar. You might receive on report "oh, Mrs. Smith's been sleeping for two hours, she's totally fine, she can wait" and then when you see Mrs. Smith, she's writhing in pain because she's been awake for the last hour and no one looked in yet to see what's going on.
DO make sure you've signed off everything, to the best of your knowledge, prior to giving report and finishing shift. No one likes wondering if a med was given (RIGHT after you've just gone home) and no one likes having to make/receive those phone calls to confirm.
DO listen carefully in report. The nurse who is going off shift would like to do so quickly, without having to repeat herself because someone kept looking for the coffee creamer rather than focusing on what's being said.
DO smile. Does a world of good for everyone around you. DON'T complain to your patients about how you are new and therefore don't know what's going on--CONFIDENCE is key, for you and for instilling in them. Don't lie, but don't feed anxiety (them AND you!).
Hang on tight, it's a wild ride.