Help!

So this will be our 3rd baby, so we have the hang of things and an the basics of what we will need for this baby, BUT our other two were born in April and June so this is a whole new ball game to me. What are some of the essentials for a winter baby that we wouldn't have needed for our other two. We're also trying to just get the necessary things for him, having two other kids our house is already full of unnecessary toys and things we never used so we're sticking strictly with needs until after he's born and will go from there. Also, we've more or less decided not to go to our big family gatherings for Thanksgiving and Christmas this year. My grandmother is 83 so we will definetly be visiting with her and our parents, but just not when our extended families are there. Like I said all of this is kind of new considering we had summer babies with no large family gatherings until the kids were around 6 months. Any tips or advice you ladies have would be greatly appreciated!