If you happen to know, your days of Christmas -- as they should be -- have not ended! Live each one of them. Embrace it as if it were a series of days that comes so naturally as a given gift -- from above!
From my experience, if Advent was well spent in the true spirit of anticipation, then, the joys of Christmas day and the following days will remain in the heart longer than expected. There is something special and utterly "unsuperficial" about having to wait -- even if it takes days as in Advent -- for something extraordinary. When one's heart, I think, does not take the time to recognize this, it may be hard to see that the extraordinary has come. If all days were spent as if they are all alike and things are close in proximity to being of sameness, do be careful, as the soul may have reached a plateau. It's a place where we do not want to be.
It is best to be present in the seasonal celebrations of our Church. Keeping up with the church liturgical readings, for instance, will re-live in us the story of God himself, the author of life! Our souls shall be inflamed with a deeper longing for God -- a truly wonderful place to be!
Enjoy the days of Christmas!
The Holy Family, pray for us!