For a long time I've used Google Docs to write different notes, collect links for search and drafts of my posts.
Later on IPad I've started to use EverNote. The main advantage for me was that EverNote allows to create new notes when offline and even for normal account usually allow access existing notes (but sometimes telling that a note is not available). And since EverNote implemented auto save on IPad, I stopped using Google Drive. I am able to use EverNote Desktop on home and work PCs, from different browsers, from IPad and Windows Phone.
Additional very convenient tool on IPad is EverClip ( http://clip.ignition.hk/?locale=en&utm_source=homepage ), that copies text together with the URL(from Browser page) to notes. I am missing similar facility in PC browsers.
Yesterday I've copied one of my old documents to Evernote and found, that links in the document are broken and cause error like the following: