The easiest flower to force inside is the paperwhite narcissus. All you need is a container, some gravel and a few narcissus bulbs. There's no pre-cooling required. Just stick them in a well-lit spot, keep them watered and watch them bloom. If you want to start paperwhites that will bloom around Christmas, you should start them in the third week of November.
Some people consider paperwhites very fragrant.
Others consider them downright stinky. If you want a flower that is just as low maintenance, but not so odiferous, try an Amaryllis. You can find them everywhere in stores around the holidays. And if you really love them, you can stagger their blooms so you have some blooming in your house at all times. If you want an Amaryllis blooming at New Years, you should start it at the end of November.