Ask HN: How much time do you spend in HN daily and how to manage it?

Some users at HN raise the quality of discussions. Some of the more frequent contributers give their insights into many of the daily posts. I love their comments and learned a lot .. However, i often i feel guilty , if i spend time on hn (that i should be working ..). And then feel guilty if i don't spend time to contribute to community, from which i gained so much. How much time do you spend in HN daily and how do you manage it ?