I just finally got around to purchasing an external hard drive for my macbook. I am down to something ridiculous like 5gb of space. I am still on Tiger, and won't be upgrading to Leopard for a while (probably this summer) so any suggestions on the best way to back up in the meantime? Any suggestions of software, etc would be appreciated. Also, besides the obvious (iTunes music, old photos, etc) what else can I move to the hard drive to free up space?