Using the Threadmill morning and evenings

I'm on my first week and a half and so far I've met my goal of at least once a day excercising 40 minutes on the threadmill. The threadmill I'm using is the ProForm 580 from Sears. So far I'm happy with its performance and find it comfortable to jogg on. One thing that has greatly helped is placing a long wood piece on the edges of cabinets infront of me so I can use my laptop to watch movies. This helps pass time quickly and I focus on finishing laps while not noticing time going by. The indicator of a good excercise is that you sweat alot and I've been fortunate enough to have a system to do just that :-)