Have I accomplished anything brag-worthy that day? Not really, but having the list helps on two grounds. One is to have an explanation of what was considered important enough to derail that, so I can look at trends (e.g. Am I the only person on the team who knows about X so I'm getting derailed by questions about X? Maybe it's time to revamp the X docs or give a presentation on X). The second is placating stakeholders elsewhere in the company. "We didn't do that thing you asked for yet" on its own sounds like you just don't care about them. "We didn't do it yet because of incident XYZ123 impacting $xxxK in revenue needed to be fixed" usually works better.