I use such tools as Obsidian for over 10 years.
As of today, I use:
Mindmaps (see MindManager for example) for planning
Notion for online sharing
Excel for tracking
Obsidian for PKM (personal knowledge management) in STEM fields
txt-files or pen and paper for thinking through life stuff
Ironically, among mentioned above, I beilive that txt-files increase self-awareness the most (well, Obsidian used a journal can be used this way too). Other tools just help to unload mind of extra content.
As for creation part I mostly rely on mindmaps: they provide «integrated environment» for planning, for big-picture-view and for small-details-views. OK, well, by «creation» I actually mean working on some goofy personal projects.