Where do you all keep your notes, project concepts, screenshots or other digital assets?
All my notes go into Notational Velocity. It's super fast to take notes, search through my notes, and it keeps everything in one place.
All my assets go into a project folder in Dropbox.
It's a very quick "not spending time organizing" kind of system so I can focus more on the doing.
A mixture of paper, macOS Notes app, Evernote, and OmmWriter+Scrivener synced through Sync (privacy-aware Dropbox alternative) in case I do morning writing sessions (brain dump).
I occasionally use iCloud-synced Notes.app for things that I need on-the-go and synced immediately. (I also use Dropbox to sync my nvALT text files but I still haven't found an iOS app I like for it).
Design inspiration images/video I store in Pixave, although I don't use it a ton. http://www.littlehj.com
Other than that I don't store many random snippets.