Start by collecting a few evergreen bunches from whichever local type you have. Don't choose a type with overly-long needles, such as the White Pine - you may have trouble fitting them in the bulb.
These should look fresh for a month or two. They will likely dry out and yellow before next year, so each year you'll have to pull out the branches with tweezers and replace.
I'm envisioning a dozen or so of these, hanging across the wide entrance to our dining room with a natural twine.
2012 update: as I predicted last year, the evergreens did dry up in the bulbs, but it wasn't a problem at all to pull them out and replace.