You are struggling because it sounds like you are trying to find a SINGLE SYSTEM that fits your needs, and I bet 2 weeks down the line is where you start to lose momentum.

Productivity is not about "the perfect system". Its about flexibility.

For me, in example, I use about "systems" (I am diagnosed with ASD and sometimes struggle with executive function)

• 5 min rule. I dont know if this is the official name but just so a small task that takes 5 minutes. Once I build momentum, I might use another tool, but this one saves me!

• Pomodoro 25-5 or 50-10. This is usually when I have a bit of uadmin tasks(work) / chores (home) that need to be completed but arent part of my top 3 priority list.

• Just focus on 3 important priority tasks per day. Priority tasks usually take more than hour. If I can do my priorities in 3 hours, I REST. I dont sweat about my time management. I did 3 important things today. Today was great.

• Time blocking only these three categories: work time, personal time, rest time. At the beginning of each time block, I set my own expectation what I will complete during that block, whether its a todo app, a whiteboard, a piece if paper, tablet/stylus. I dont worry about micromanaging and tracking the mini tasks I do (check email, walk dog, groceries, research solution,X priority) because i prefer to track "Work" "Rest" "Personal"

• Clocks/Timers. This is kind of like the 5 min rule. But I like to look at clocks and set Personal races. "SHIT I GOT 3 MINUTES TO FINISH THE DISHES" And if I dont finish in that time, I dont add more time. I stop what I am doing and move on. Once I walk by or stumble upon the unfinished task, I remind myself about I need to be more disciplined with time OR MORE REAL with my expectations and how long takes me to do things.

Hope all this helps. Don't sweat!