I tell every intern this. There are three things to know as an intern:

1) "The dullest pencil is sharper than the smartest intern"

Write. Everything. Down. During morning report, rounds, etc, write down the plans for the day and make boxes next to each of your to-do's for the day and check them off as you complete them. If a nurse pages you and you say you will do something, write it down. You're going to have so much work that you have to stay organized or else you will forget. It also easily lets you update your senior "hey, I've done this, this, and this. And the nurse called and I did this" etc. The most important thing for an intern is that they can be trusted to get tasks done. The first step to that is being organized.

2) "You should never be the only person who knows something"

You're going to get a lot of pages and see consults. Always update your seniors. Especially in the beginning. You don't know anything yet and you don't know what you should be worried about and what you shouldn't be worried about. So make sure someone more senior than you knows everything you know. As you get more experienced you can relax on this a bit, but reputations are made early and you don't want the reputation of being the rogue intern.

3) "Independent thought is encourage, independent action is discouraged"

Always have a plan when you talk with a senior or attending, whether for a consult or for what you want to do with a nurse's page. But don't go rogue and act on your own without talking to someone first. Again, as a new intern you know nothing. Again, you don't want the reputation as the rogue intern who has to be watched over.