Where to start?
1. Use this time with your family to discuss budget and who will pay for what. It may seem early, but when is the next time you will all be together to hash this out?
2. Try to get a general idea of what you and your fiance want. Is it a big formal wedding in a vineyard in spring or a casual party with lawn games and s'mores? This will help you get an idea of the next steps you need to take.
When you get back to regular life after the holidays you can start checking out venues and trying on dresses, but for now just try to enjoy your holiday and figure out what you want (and can afford).
Below are a couple links that I hope will help ease the stress of a newly engaged couple.
A group of independent wedding professional who work together to perfect your big day.
Wedding planners who can guide you in the early planning stages and wrap up the lose ends as the day approaches.