It’s hard to be effective with fractured hours, but it’s easy to be stressed out: 25 minutes on a phone call, then 10 minutes with a colleague who taps you on the shoulder, then 5 on this thing you’re supposed to be working on, before another 15 are burned on a conversation you got pulled into that really didn’t require your attention. Then you’re left with 5 more to do what you wanted to do.
