run a workshop that is longer than an hour I use Google's built-in timer function to time breaks. All I have to do is type "set timer 5 minutes" into a Google search and a timer appears and starts counting down. You can enter any amount of time after set timer and you can pause the timer if you need to. Watch the video below to see how that works.
A new to me feature of Google search is the option to use a metronome. To access a metronome in Google search simply type "metronome" into your search and the metronome appears. You can adjust the tempo of the metronome by dragging the slider below the tempo display.
Thanks to Lifehacker for the metronome tip.