[rcarmo]

1) Kindle/Goodreads, streaming service watchlists, iTunes playlists

2) Zero times. I do use ArchiveBox for snapshotting interesting articles and searching for them later, but mostly out of fear of some things falling off the Internet (which is increasingly common)

3) In practice, very very seldom. I stopped using delicious and Instapaper and whatever else because search is a solved problem.

4) Mountains of documents and plaintext notes, with file names prefixed with YYMMDD. Seriously, I can track down what I was doing ten years ago in under 5 seconds.

5) The fact that people keep reinventing note-taking apps and none of them do what I need, so I stick with my wiki (taoofmac.com) and my filesystem + Spotlight.