Not really notes. Kinda' the same. I copy/paste segments with attributions into a folder on my PC labeled Hubber Hub Research. I usually open a Word document labeled with the year, month, and title - quotes & stuff (2014-3 Quotes & Stuff). It stays in a numerical order that way.
I keep an Excel Spreadsheet with worksheets by the Group Names I use for hubs. I list them with a very short subject heading in the first column, date discovered to reference to the Word document, next column hubber name, then the current last updated date at the bottom right of the hub, and finally hub title. I can sort by subject that way. Then if I write on the subject of a hub group I can check. I can choose that hub or another if I wish to link as additional reading or as supportive information in a paragraph.