Have you ever built a tool to combat your own procrastination?

A developer shared their experience of building a customizable forward proxy to help manage their procrastination. They initially created it for personal use but decided to open-source it for others who might benefit. The tool allows users to create rules visually and is aimed at power users who may need to write some Python. Have you ever created a tool or project to help you stay focused or combat procrastination? What was your experience like?