I use getpocket.com for that. Doubles as offline reading app for long plane rides :) I also just installed "Hacker News Discussion" Chrome extension which show

I use getpocket.com for that. Doubles as offline reading app for long plane rides :) I also just installed "Hacker News Discussion" Chrome extension which shows whether there are HN comments for any webpage I visit. This should be a very handy way to go back to comments for an article I am reading much later.