Steve Nix has a great article titled How to Pick a Christmas Tree that I actually just used to pick out OUR Christmas tree. So if you're thinking about picking out a tree soon, I would definitely recommend this fine article.

Here's some more Christmas tree resources on the Web:

• The National Christmas Tree Association: Lots of good information here, including Attack of the Mutant Artificial Trees - can you tell that someone is not fond of the artificial tree?
• History Channel - The History of Christmas Trees: Excellent article in a series.
• Rockefeller Center Christmas Tree: Live shots (refreshed every two minutes) of the Rockefeller Center Christmas tree.
• The White House Christmas Tree: Official site of the White House Christmas tree and history of Christmas in the White House.

Related: Find a Christmas tree on the Web (or stuff to put under it) with my list of the Best Shopping Search Engines.