My advice would be to treat the notes as more stuff. I use meeting notes as a case study, and advise folks to treat the meeting notes (workshop notes in your case) just like anything else: Toss them into your inbox, and process and organize them normally:
What is it? Meeting notes. Actionable? Yes. Action: Pull out ideas, projects, actions, etc. Two minutes or less? No.Thus it becomes an action (or if very long, a project with an action), something like "process workshop notes." When you decide to do that action, you work your way through the notes, taking care of each item.
Note: Processing the notes themselves may be a non-actionable item for you, depending on your priorities, possibly a Someday/Maybe. Also, many people find processing notes like this to be tedious (I do). The question is whether it's worth it to you or not...
Hope that helps!