The most commonly used tools are

tool

Password and work progress management

Evernote

Evernote, after all.
I rely on it so much that it is no exaggeration to say that without it, I would not be able to do anything.

Evernote can encrypt text, so I also use it to back up IDs and passwords for various websites.

I also use it to take pictures of whiteboards and add comments, and to quickly save pictures of PCs and various devices with their installation status and model numbers, along with comments.

I can use it on both my smartphone and tablet, so I can use it differently when I’m on the road and still have all my information in one place, which is very useful.

Organizing Ideas

Google Keep

Recently I have been using Google Keep as a memo. If something happens, I jot it down in Keep and organize it later. I jot down anything and everything anyway. It’s convenient because I can use it on my phone, tablet, or PC from anywhere.

Microsoft OneNote

I often use Microsoft’s OneNote to organize my notes in Googke Keep, and OneNote is perfect for organizing my notes in Google Keep into different categories because I can paste them in any format.

Specifically, I use a PC with dual displays, one of which shows Google Keep. I can check the contents and summarize them in OneNote. I think this is a good way to organize ideas.

In the past, I used to hand-draw notes on Post-its and paste them on a whiteboard, and then organize them as I move them around.

XMind

Another tool that should not be forgotten is XMind.
Mind maps are essential for structuring information. I always rely on Evetnote and OneNote, which allow me to take notes but do not allow me to make associations well.

However, it may be necessary to devise an operational method for associating similar items when they appear at the tip of the tree.

What kind of tools do you use?