I am the same; what helps me is being very cognizant of how I feel after over-indulging in Reddit or HN and how I feel after some exercise/time spent outside/watching a good documentary.
Some journaling and/or a quick meditation in the morning help me keep in mind these things - and consequently more grounded.
Yes, same here. I noticed reddit is much better at providing (useful and direct) answers.
I think part of the reason for that is that off-reddit there's so much emphasis on SEO and analytics (trying to hit all the right keywords, linking to other pages/sites, tricking people to stay on a page/site longer etc.) that everything becomes very cluttered very quickly.
Now, this seems like something I would happily use! Is it possible to somehow export the notes (highligths included)? Do you also plan a Safari version?
I love how simple-yet-not-too-simple it is.