Let’s play a game of inspiration:
Give exactly 3 books, movies, albums which are THE important ones of all times to you. These are the “if you don’t know them you’ve missed essential stuff”-ones. Make it 3 and no more! This limitation is the hard part, as you will find out if you try it.
Here are mine:
What are yours?
UPDATE: picture about StefanH’s comment (see below):