On

On the phone

Online

On the train

...the daily commute is spent this way by many...myself included. 

Julia said years ago that she caught up on her emails while she was on the train. She'd write them while underground and send them and once she surfaced they send automatically. I have been doing as she had done and now with wifi at many stations along the way the emails don't have to wait until I get above ground they are at their destination before I am.