Tea and kitchen timing
Black tea is commonly steeped for three to five minutes, and many short kitchen jobs fall in the same range. Start the timer when the water goes on the leaves and the alarm tells you when to take them out, so the tea does not turn bitter while you are doing something else.
Standard boxing rounds last three minutes, and many interval and skill drills borrow the same length.
Standard boxing rounds last three minutes, and many interval and skill drills borrow the same length. Use Restart between rounds, or set a one-minute timer in a second tab for the rest period.
Short talks and pitches
Three minutes is a common limit for lightning talks, thesis-in-three competitions and practice pitches. Put the countdown on a screen the speaker can see so they can pace themselves without checking a watch.