Web alarm clock for 2:03 p.m.
You are halfway through another task when 2:03 pm arrives, but the city tax office documents cannot wait on your desk. Set the alarm as the point to pause, gather the papers, and leave with enough time for the trip and any queue. The 3:00 pm mark gives you a clear boundary for wrapping up what is in front of you.
Your tax office errand depends on hearing the alert before you head out, so keep this alarm page open while you work. Closing the tab or the browser stops the alarm, and a sleeping phone or computer may prevent it from sounding; that could leave the documents sitting at home past your planned departure. Keep the device awake, leave the sound audible, and check the displayed alarm time before returning to your task.
A midday paperwork run is easier when hunger or thirst does not become another distraction. Have a glass of water now, and choose a light merienda if you need something before leaving; a banana or a few crackers can fit into the pause without slowing you down. Save a full late lunch and a large drink for after the tax office visit, especially if you expect a queue or limited access to a restroom.