Tip-Top Writing Tips

I think saying those two points "aren't good advice" is an oversimplification. It's definitely good to get in the habit of writing down your ideas; that doesn't mean you should use all of them in one story, but one of those ideas might lead you to write another story later. Or you might have an idea that's terrible and stupid, but through some chain of mental associations, leads you to a good idea.

Likewise, on adding plot points - okay, I will agree that adding them just to make it longer isn't the best idea. But thinking about adding plot points is going to be helpful. Heck, it could even be helpful to write a scene, then decide it doesn't really fit and put it aside; maybe the process will give you ideas about your characters, plot, or setting that you still want to work into the final product, just not in that particular way. Or it could make you think about another story you want to tell later!

I guess a better way of putting both of those would be "always consider new ideas for your story; don't always actually use them."