I enjoy a computer game called DotA. You play against other people online. Once a game has started, it is good habit to do things in the game at certain times. I wrote a Javascript Angular app to remind me of what to do.

Live webapp: https://apps.stephentpollard.com/dota-timer/dota-timer.html

Repository: https://publichg.stephentpollard.com/dota-support-timer/