You spend a lot of time at your computer, right?
Here’s the thing– people who weren’t raised with computers (i.e. anyone over the age of 30) don’t see sitting at a computer as work. They think you’re goofing off, playing on Facebook or something.
Here’s what you need to do, instead– do. not. sit. at. your. computer. Walk around the office, look for something, anything to do. Doesn’t matter if it’s as simple as cleaning coffee pots or filing papers. It doesn’t even matter if you’re actually doing anything. Go through the day files, find something interesting, and ask your boss what it is. Worst case, find some old scripts and read them.
In short, do anything, anything, but browse the internet.
And while we’re on the subject, if you’re not doing anything, ask your boss for something to do. Or, if things are really slow, ask them about themselves. What was their first job? What was their first movie/TV show? What shows do they watch?
People in this business like to talk about themselves. Ask questions, and then let them talk. Do NOT start talking about yourself. You’re twenty-something. Nothing you do or have ever done can possibly be of any interest to them, because they did it long ago.
If your boss does give you something to do, pay strict attention to their instructions. Write it all down, and the next time they ask you to do the same task, do it EXACTLY the way they told you before, and do it correctly. Double check your work, then check it again.
But most importantly, DO NOT SIT AT YOUR COMPUTER.