>>manbit+F
If you're looking to put the brakes on that, I've used LeechBlock to add a 5-second timer to opening a new HN window (along with other block schedules). The timer even fails if it loses focus, so it really helps slow you down.
>>squeef+Ph
Have you never suffered from habitual reflexes? I blocked twitter for a while in my hosts file and a dozen times over those first few days I instinctively opened a new tab and typed twitter in