I once had an 1.75 hour commute each way, 3.5 hours daily. I had to program during the commute---otherwise there weren't enough hours in the day to get my work

I once had an 1.75 hour commute each way, 3.5 hours daily. I had to program during the commute---otherwise there weren't enough hours in the day to get my work done. There were periods of laptop-closed thinking, but no daydreaming or looking at the scenery. No Internet connectivity, so I had to plan carefully.