Advent season is not about the gifts that you will receive for Christmas but is about remembering how loving God is that he gave His only begotten Son to be our redeemer.
Penance or asking for forgiveness, praying, attending mass, showing our love through generosity, and learning to pause to realize that Advent is not about the material gifts but it is a time to remember that Jesus is our savior are ways to show our preparation in this season of Advent.
The color purple is widely seen inside the church because it symbolizes the royalty of the coming of the King Jesus Christ and the penitential tone of advent.
The circle of the wreath, which has no beginning or end, symbolizes eternity of God, the immortality of the soul, and the everlasting life we find in Christ.