Most people think this is a simple task that needs no attention, but there are some things I have learned while living in an apartment for the last 4 years. These are thing that while living in a one story house, I never really thought about, and things that when I moved into an apartment I learned by experience, but if I can help even one person figure them out faster (passably Stompy my neighbor), the world will be better off.
1. Take off your shoes when you come in, walking in shoes in the apartment makes you walk a little harder (plus it makes the carpet dirty).
2. Don’t throw stuff, even small stuff can make a loud thud when it hits the ground.
3. If its more than just you using the fridge, get a mini fridge for drinks & beverages.
4. Be mindful of your neighbors, I cannot stress how important this last one is. You are not the only one who lives in the building. Don’t walk hard, don’t stomp around, don’t be an ass an pier over the edge of the balcony and say “Those are some big hot dogs” then giggle to your stupid ass roommates about it.  You never know when you will need help from the people who live near you, don’t piss them off.
That’s basically it, I’m sure other people have stuff to add, but I have to get back to work.
PS Stompy, if you are reading this: SHUT THE FUCK UP!!