Hi,
I've made a workflow for SideNotes app. I'm the developer of this app, so it's the official workflow.
With this workflow you can quickly take notes, search for them, use your notes as snippets, create folders etc.
All information about the app you will find on its website: https://www.apptorium.com/sidenotes
You can get the workflow on its GitHub page: https://github.com/Apptorium/alfred-sidenotes