A few helpful tree care tips will enhance the enjoyment of your Christmas tree and keep it fresh and fragrant thoughout the holiday season. 
After you bring the tree home, cut one-quarter inch off the base of the
trunk.  Keep the tree outdoors in a container of water. Protect it from the wind
and sun  until you're ready to decorate. This helps the tree retain 
moisture.

Before you bring the tree back into your home and place it in
a  stand, make a fresh cut a minimum of one-quarter inch off the base of the
trunk.  This reopens the tree stem so it can take water immediately. Place it in
a stand  with fresh water. Don't allow the water level to drop below the fresh
cut or the  stem will reseal.

Remember, trees are very thirsty. They may
drink from 2  pints to 1 gallon of water a day. Use a stand with 1 gallon
capacity or more.  Check it daily and supply fresh water as needed.