Previously, I did use gmail drafts, but now I use private installation of doku-wiki for documentation of my design, schemes, know-how, created source code (git module), lesson learned.
Wondering what use HN community, if there is better way or tools for that.
Evernote's Search is much better than OneNote's (Windows' Search), searching seamlessly even inside attachments, but I absolutely hate the look of Evernote pages; just a personal thing. Could be something as simple as Tahoma vs. Calibri, but I think it's more than that...OneNote really looks good to my subjective eye. Plus I like the keyboard shortcuts.
For PDFs, get really good at whatever Reader you use w.r.t. annotation tools. I love PDF-Xchange Viewer for annotation (a Windows product).