Well, I don't think he's suggesting any tags, but it is true, there isn't one surefire tag. If you're hoping to get to the top of a trending page, even in a tag, that's going to be tough, just because most of the folks that end up there are either high in SP, using bidbots, or both. I'd say the best bet is to keep consistent, find the few tags that you know you might have some expertise in, and try to build a following. And in addition to that, it's a good idea to leave clear and thoughtful comments on other people's posts about what they're talking about so people know you're around. That more than trying to get the trending pages will help with post rewards, especially in the earlier stages of Steemit.