Hacker News is not a bookmarking service, here are some I know of:
* https://delicious.com/ - Discover, share, and organize the hottest links online
* http://pinboard.in/ - Pinboard: social bookmarking for introverts
* http://www.xmarks.com/ - Xmarks | Bookmark Sync and Search
I would have down-voted you for casting your way of thinking on me while being a smart-ass. It is not your call to say what is the "appropriate" way for _others_ for editing cat pictures or managing bookmarks.
Your second edit shows that you care enough to raise your level so here you go.
If you're on a mobile device, do what I do: "share" or "send" the url to your email app and then mail it to yourself. It goes directly to my inbox, and I don't mark it as "read" until I've "actioned" it.
I use this approach as well, but I also have a filter in my mailbox that sends those mails to a folder 'notes to self', to avoid excessive notifications and inbox clutter.