Yeah that's the main reason for Press It plugin. You can create a bookmarklet that should work in the most browsers. I use it in Chrome, it also grabs page title and some content from the page and prefills it.

Also I use this instance of WordPress like a scrapbook and dump all kind of information in there. While reading books on phone or iPad, I can add quotes from them. Android app is pretty good for this. Also I take photo notes for example while shopping for something in a physical store, I can add pictures of them to a post etc and then review later. Once a month or so, I download backup.