Advent, it seems, is one of the most misunderstood liturgical seasons. I believe most of my followers know these things already, but let me reiterate: Advent is a penitential season. The color is purple, the universal color of penance in the liturgy. You should not be eating a bunch of chocolate, playing Christmas carols, and going to multitudinous Christmas parties during Advent. (I understand that sometimes one is constrained to attend a party - that's obviously an exception.) Trust me, your Christmas will be much more joyful if you've been doing penance for four weeks!
So what should you be doing during Advent? Well, there are plenty of traditions to choose from, but in general, Advent should have a theme of recollection and detachment from the world: one should try to separate oneself from frivolities like movies (and TV shows), desserts, secular music, etc. If we think about it even a little, we can find plenty of things that we do all the time which simply have no value (facebook, tumblr, youtube, movie/TV-show-marathons, I'm looking at you here) and that we would benefit from cutting out of our lives as much as possible.
Now, it's very important to make our penances and sacrifices not just a negative thing -- I mean negative in the sense of taking something away. Yes, you subtract things from your life, but it's pointless unless you fill up that space with holy things. Advent is a great time for taking up daily meditations and catching up on your spiritual reading. Take the time when you would be browsing your favorite websites or watching super-lame Classic Who episodes (not that I have ever done such a thing) and read a spiritual classic or the lives of the saints, say a rosary, make a meditation, make an extra effort to prepare properly and give thanks for your Communion, do an act of charity. These are all positive things which fill up the void that we usually try (ultimately unsuccessfully) to satisfy with senseless entertainment.
Because I have a special pet peeve against inappropriately-timed Christmas music (I can look at the floor to avoid gaudy decorations, but there's no salvation from horribly-adapted carols), I made you all a special 8tracks playlist of appropriate music for Advent. I hope you enjoy it, and may your Advent be truly blessed!