I have been doing a lot of research over the various software systems to use as a Personal Productivity system and I have not seen such a comprehensive solution provided in a series of free tutorials in YouTube by August Bradley using Notion.
Here is the Process Flowchart.
August has taken Notion to the next level and incorporated the best practices of many productivity concepts such as GTD, 12-Week Year, Gamification, Break the Chain and Habit Tracking.
Additionally, he made a video that shows the best use of these new types of note-taking apps like Roam Research for knowledge management
Notion + Roam Research
I am in the process of setting this up for myself. It will take a long time but should result in the “Perfect Productivity System” the Golden Grail!