Originally Posted by topflightpro

During the winter, I'm on the trainer nearly every weekday for a minimum of an hour. My longest single trainer session was a hair over four hours. I like doing intervals on the trainer, as outside factors like stop signs/lights, traffic, hills... don't effect the interval effort.

I also find having something to watch is better than just having something to listen to. Action shows/films work well for me. Also, make sure you have a good fan to help keep you cool.