I wasn't aware that you could create favorite forums. Selected forums is, I believe, just the most recently active forums in a list. I suppose you could open up a forum page and then save it in your favorite places on your browser. I usually just open up curezone and check the list of the most recent, certain ones always stay active (Shelley, Andreas, Liver Flush, Master Cleanse) and if I want to post or check an inactive one I just click on its alphabet letter, for example I'd click "E" to find this Exercise forum.