The simple setup I use to get stuff done: 1. A task list with only what needs to be done. Phone on do not disturb and out of reach. 2. A timer, so I only focus on that one task. 3. A drink or some gum, whatever works for you. I like coffee or a Diet Coke. 4. When the timer ends, I check my output. Am I actually producing, or did I fall down a random rabbit hole? That's it. No fancy app. Step 4 is the one most people skip, and it's the one that matters most. Try it once today and tell me how it went.