The third trimester is in full swing over here- I look and feel about 40 weeks pregnant. While the holidays are coming, life is slowing way down for me. I'm at home all the time, minimizing errands and trips out of the house to just a couple of days a week, trying to be seated or lie horizontal as much as possible, and preparing for babies.
We just finished a ton of work on our house: setting up the nursery, painting the living room/ kitchen area, building a wall to make a new bedroom for ourselves, and playing switcharoo with almost every room in the house :) My birth plan is done, my doula and OB are all set and we all agree on how things should go presuming that there are no problems, baby A remains head down, and we are ready to go (but not just yet of course!)
So now that all of that is done, Im focusing on the small things: getting last minute items, packing a hospital bag, getting childcare in line for DD, sorting and organizing baby clothes and diapers, and buying Christmas presents (online only). I've saved this last trimester for reading positive birth stories, positive NICU stories (just in case), doing spinningbabies.com exercises, learning to knit, and spending as much time with DD as possible
For me, the third trimester begins the time where you are no longer so many weeks pregnant, you are counting down the weeks. So, for example, I think to myself, "just 10 weeks left" as opposed to "Im 28 weeks." (I have an induction scheduled on Jan 24)