9. Programs Password managers

You use password managers to have credentials saved locally in a much easier way than notepad copy and paste.

I use keepassxc. Simple. does everything, easy. GUI.

It is treated like a database. You can encrypt them for moving them around with unencrypted storage safely with a built-in feature.
You can open multiple databases and move them around and switch in tabs like browser tabs.
You can make custom entries but defaults like title, username, password, last modified, personal notes and URL are always present.
You can also tag your credentials as currently valid or expired, date when it expires, attachments, groups, last accessed etc. You can color your entry and it is quite customizable.
It also automatically clears your clipboard in a few seconds. Very nice.
It has lots of advanced functionalities too, it has everything!

https://www.youtube.com/watch?v=xfwQrXSutuY

Avoid using cloud password manages because you put all trust that the guys that keep it would not use your credentials themselves and do not leak it to the whole internet. But that sometimes happens. Keep at least your most important passwords locally. Google account sync, firefox account sync, whatever sync is scary. Do not save your darknet credentials anywhere else than locally... Unnecessary risk. And I bet these companies read your passwords anyway to know what websites you visit and which accounts you use to then report it to advertisers.