OK, well, I know how to do them. I did read the tutorials, after all. But after nearly thirty hours, I still haven't actually spent any of my affinity coins on skill links, and I don't know if I've gotten as far as I have without them because of lack of necessity or bullheadedness or what have you.
So I should probably start getting some Skill Links going. Any advice for someone that has more affinity coins than he knows what to do with?