I've noticed that answering continuously helps me "reduce" the number of notifications, so I'm less stressed when I'm doing things continuously.
On the other hand, it seems like a 24/7 job. That's mostly how I feel about PH lately.
I reply in bulk on Twitter. So I choose one day a week and try to go through all messages, notifications and the like. At the moment it takes about an hour.
What about you?