Christmas Fast?

Happy Feast of All Saints / All Souls!

So I was reading the Rule of St. Francis lately (probably because of the movie I watched...) and apparently, it was the practice among the Franciscans to fast from the Feast of All Saints until Dec. 24th.

It seems the best way to prepare to celebrate the central mysteries of our faith (Incarnation, Paschal Mystery... etc) is to fast - Hence, why we have Lent. But I wonder why the practice of fasting before Christmas doesn't happen in the West so much anymore?

In the East, the emphasis on fasting is stronger than it is in the West, particularly in Lent. In Slavic countries, they are a bit more hard-core in their fasting: In Lent, they abstain from meat, dairy, (fish?) dairy, and wine. (Basically, you go VEGAN for Lent). Phillip's Fast (pre-Christmas Fast) is a bit more lenient. Perhaps we should re-discover this part of our Tradition and observe Advent as more of a penitential season.

I guess I'm asking: What are you giving up for Advent?