Agree with the Sailor... Ride outside, take different routes, etc. Much more enjoyable in the long run.
However, if you, like me, live in a bit of the globe where winters are retarded (you can expect balmy -20 - -40 C weather in the winter here) . Then you need something for the winter. If you like your bike, then I'd suggest a trainer, cycleops are pretty good (
www.cycleops.com). There are quite a few different ones out there all over the price board. The ones that include the electronics equipment are pretty cool.
Of course, if you don't like your bike, then this is kind of a moot point.
