We are Christian (raised Catholic, somewhat lapsed although DD has done her sacraments, but she goes to a CofI school and we are more of that protestant ethos than purely RC, and DH is an engineer, I'm a scientist, so there is a healthy scepticism going on too).
We don't tend to decorate until mid-December. Part of my decorations are a number of different sized cribs. (and possibly 2 trees this year...).
The decorations don't come down until after NY, sometimes on 6th January but some years DH will want them down a little sooner depending on when we get back to work/school etc.
But on the pagan aspect, when I had an allotment (for about 5 years until work pressures meant I couldn't dedicate enough time to it), I used to go up around 21st Dec annually and harvest final crops for Christmas Dinner and also bring a hip flask to do a Winter Solstice scattering on the ground.
And I also keep up the family tradition of the youngest lighting the Christmas candle on 24th (to show there is "room in our Inn") and we have a family reflection on the good and bad of the year just finishing, and remember those who have died, finishing with a family prayer.
There is time to do both. And have parts of the house looking like Christmas threw up in a very spectacular secular way.
We mostly focus on it as a family period though, and as our lives in general are far too busy, we don't start to put up the decorations until the other aspects start to slow down slightly and allow us to reflect on the family aspect. And signal to ourselves that we need this quieter period to slow down, and focus on ourselves and each other.