What do we do when we know someone, or something, important is coming? We start to prepare. We start to clean house, do the cooking, "prepare" for the event or person. In this case we are preparing for two things. First we are preparing to celebrate Jesus' "birthday" BUT we are also preparing for Jesus' return. Advent is a reminder to each, and all, of us to be ready -- to listen for what God is asking us to do and DO it.
It is also a time, especially right after Thanksgiving, to celebrate all the blessings God has given us!
I encourage you to prepare but also to give thanks while you are preparing.