I always wonder when I see all these best notebooks / note taking systems, etc. why people don't spin up any of the dozens of wiki servers.

You can put it online so you can get to it anywhere

You can run it off a stick to keep it with you (Tiddlywiki)

You can cross link pages to be able to collect things together

You can search. Some even have auto link builders so you can build a page of links to pages that match a category.

Some support Markup so you have formatting the way you want.