iwtl the smallest habit you adopted that ended up having a huge impact on your productivity?

Recently, I started doing something super simple: writing down my 3 most important tasks for the day every morning. No more endless to-do lists. Just 3 key things. Honestly, it completely changed how I approach my work.

Do you have any small habit that made a big difference in your life? Or maybe a tool/productivity hack you’d recommend to everyone?