Favorites - how do you assign them?

I'm trying to arrange my favorites and whatnot on my personal page, and I cannot for the life of me figure out how I add favorites. I obviously figured it out once, since I do have a couple stories showing as favorites, but I don't see it any more. Can someone point me in the right direction as to how to declare a story as a "favorite" ?

As far as I can tell if you checked the 'Recommend it' box on the stories page it ends up in your favorites.

Yup that's it. And "Current Favourites" are the ones you've checked as "currently reading" and as "Recommended". See, it's all logical!

Strange. Does the system update favorites at very long intervals? I waited quite some time after marking several stories recommended, before creating this thread.

Now they are favorites. All seems well, now that I know there will be a long delay.