Zen Timer has improved my daily work life. I have ADHD, and I recently went through a snafu where my disorder was untreated for a couple of months. In order to get any work done, I needed more structured work time, so I gave the Pomodoro technique another go. It turned out to be a huge help for me, and if it can help someone with a level of concentration as hopeless as mine, I have to believe it's a great tool for more "normal" people, too.
At its core, Pomodoro is a simple method of working and resting in timed intervals. There are a variety of timers available on Mac and iOS for this, and just as I was making the effort to start implementing the technique again, I found Zen Timer. It's a beautiful and creative app for interval timing that immediately became part of my daily workflow.
Zen Timer generates an animated tree which grows during a work interval, and when the timer is up, the leaves of the tree fall to the ground and rest there while it counts down to your next work period. When the next work interval starts, the tree begins growing anew. Zen Timer generates a unique tree each time, and you can customize the colors, line thicknesses, transparency and more things that people with ADHD (or OCD...) probably shouldn't be allowed to spend too much time tweaking.
It's visually customizable, but I've found there's a specific way I like to run it: I set the size of the window as large as it will go, make the window background transparent, and set it at the bottom of the viewport at Desktop level on one of my auxiliary displays. You can hide the timer and controls during work periods, so I'm left with an elegant tree growing on my desktop while I work. I customized my wallpaper and the tree colors, of course. Because I could.
While Zen Timer comes with intervals set to the Pomodoro defaults, its timer settings are easily modified to work with any lengths of time in each interval.
If you're looking for a new Pomodoro timer on your Mac, or are like me and just need a better way to work, check out Zen Timer ($4.99 US) on the Mac App Store. If you're curious, check out the developer's website for an excellent video of Zen Timer in action.