You never will.
But you can't close the tab or you can't find the content again and bookmarking is mostly useless if you use multiple computers and browsers daily.
I got over my tab-itis with Pinboard[0]. If stuff seems to sit in my tabs for too long, I can send the link easily to Pinboard, slap on a few tags if it's an unique one or grab a few of the suggested ones if it's a common bookmark.
With the Archiving feature it'll even mirror the content for me so it doesn't get lost in the tides of time.
I'll never look at most of the stuff I pin, but my mind is at ease because the precious stuff is stored =)