Any day on the bike is a good one. Its quite ok to only do 1 to 1.5 hours for each ride. I basically do either 35-40 min (park and ride) or 1.5-1.75 hr (from home) on my commutes each way to work on the weekdays only. And they gave me plenty of miles last year (~ 4000). For the discomfort, I agree with the others to try another saddle. Perhaps try a bike shop that will "loan" you a saddle until you find the one you like?