I still miss notepad.cc (A web·based, password protectable notepad — RIP), so for now all I use is just one (local) single iA Writer document, containing everything I want to note/remember. (I also tried keep.google.com, but this is still too bloated for my taste.) Maybe you'll like milanote.com? (Mood boards meet note pads.)

Edit/Addendum: And nothing shall ever replace Pen & Paper. ;)