If you are feeding the birds, setting your tree up nearby gives the birds a place to sit while they take turns going to the feeder. This gives us more to watch and saves the birds from using energy to fly back to the trees and shrubs farther away during the cold winter. That tree also provides shelter from stormy weather. If you already have some evergreens in the landscape, you have already witnessed this survival technique. While you may have an artificial tree, there is likely a neighbor that has a live tree that you can get ahold of. You can buy or make your own suet balls to hang in the tree as another source of food and energy for the birds. You will begin to attract the larger birds that really enjoy suet and provide more entertainment. Other sources of food and a great family activity will be to pop some popcorn, buy a bag of cranberries and string them together to hang on the tree. Clear out the crisper drawer in the refrigerator and put out apple or orange slices that are too far gone for us to eat.
If your winter activities don't include the birds, you can use the tree in the landscape. We count on snow to provide an insulating blanket on our tender and any fall planted perennials. So far this winter there has been plenty of the white stuff. By using the evergreen branches cut from the trunk to cover those plants. They will benefit next spring as the snow melts away. You are providing the protection from the drying winds and any branches covering the perennials will also collect additional blowing leaves for protection and disguise, your perennials are hidden away from the rabbits and other wildlife that enjoy the young tender leaves. The soil will stay frozen too, and the young plants will not be heaved out of the soil by the freezing and thawing cycles that occur. Go ahead and set the tree trunk aside until gardening season and plan on using it to support peas or beans or grow morning glories in the garden. By the end of the 2014 garden season, the trunk can be burnt in the outdoor fire pit.
If your community does not recycle holiday trees, consider contacting wildlife organizations to see if they can benefit from using your tree. They can be used to provide habitat for fish.