I feel like it's much easier to not do anything when it looks like you're doing something at your desk all day. Mix in a few meetings and random chats, it's very easy to go incognito, productivity wise.

I think we've all had days where we've gotten to the office and had a problem we're working on that doesn't get solved that day. It is actually really taxing and feels really bad to not accomplish anything, as if you've wasted the day.

I've found that the ability to more strictly control distractions at home--not needing to deal with the pressure to chat with co-workers and eat lunch together, for example--has led to far, far fewer days of no-solution. At the same time, it becomes even hard to "give up" on that day's productivity and clock out, since there's no real leaving the office.