System vs usage and practicalities

Well look at me. I only just joined up today, and already I'm abusing the system. How? favorites. I'm 'favorite'-ing stories I want to follow but have already read some (or all (published parts)) of, since those don't really belong in Read Later. I have heard of a 'track' feature, but I don't know how to enable/use it -- for all I know, it was an old feature but is no longer available. And I don't want to be 'watch'-ing authors when I'm only interested in particular stories. So here I am, favoriting. Luckily, all the stories I'm applying it to so far deserve it.