By not doing the commute. I know, it's not always an option. Podcasts that keep your attention ("Mixergy" and "Startups for the Rest of Us" are the ones that do it for me) or some learning on the side (say Coursera courses) will keep you occupied.
As a note: A lot of people usually recommend "This Week In Startups" or TWIS, but I find it to be an absolutely reprehensible show. It's just the Jason.