Last improvements: start using a mindmapper (VYM in my case) and start using a password manager (keepassxc, but I can't say I love it. It's just okay enough for me, and for now).

I expect more improvements to come from the usage of VYM, since I started mapping my system today, so that I might have a cleaner view of what I should change or improve.
I started it in french, and, as I was refining it, I thought it might be interesting to share it so I started changing some stuff to english, so maybe someday I'll share it, most likely on IRC though, since I don't really see the point at sharing that kind of stuff on a permanent place.