I love this brass mechanical counter I discovered at the SFMoMA store. It's the only product made by a local company, Nanu Electrics, and I use it to keep track of my Pomodoros (25 minute work intervals). It's so satisfying to press the button and having it out on my desk, I can see how much I've accomplished since I started using it and can anticipate the reward of getting to press the button :) Use it for tracking any goal, it goes up to 9,999!