Okay, let's keep the ball rolling. Here's the next installment in my analysis of the concepts at the end of No Limit Hold 'Em: Theory and Practice by David Sklansky and Ed Miller.
Concept No. 16: Occasionally overbet with moderate hands to disguise your overbets with excellent hands.
No; this seems like terrible advice. By "occasionally," I think Sklansky and Miller mean something like "randomly," and I've already discussed in my Concept 3 analysis why I think this idea is vastly overrated. In their discussion, S+M say "as long as you don't do it too often, these overbets won't cost you too much, and they will support you those times you make big bets with excellent hands." I think this is wrong. If a play costs you anything in the long run, it should be considered "too much," because you can just fold and lose nothing more. If you determine that a certain play is +EV, you should do it every time, not just occasionally. If it's -EV, never do it (except maybe in some extremely rare instances if you really know what you're doing). Something I forgot to mention about randomizing your play in my Concept 3 analysis is that if you ever make mistakes when you play poker (ie, make a play that is -EV), you are already randomizing your play. Don't make matters worse by adding extra mistakes to your game! Of course, I assume everyone makes mistakes, so this advice should apply to everyone; to some extent, human error automatically disguises your hands.
There's another, more obvious, explanation for why this concept's advice is bad. If you want to "disguise your overbets with excellent hands," the best way to do this is by overbetting with draws as semibluffs. The example in the book suggests occasionally overbetting with KQ on a board of Ks9s7c. This is going to force your opponent to fold most of the hands you can beat. When you are behind, you will be called or raised and have only about three outs. I would suggest simply value-betting KQ while overbetting with hands like T8 or flush draws as well as with your monster hands. Semibluffs are great because your opponents are likely to fold better hands than yours, but you have lots of outs if you get called. Neither of these advantages exist when you overbet with mediocre hand like KQ on this flop. Moreover, semibluffs actually do a better job of "supporting" your overbets with excellent hands, because if your opponent has KJ or KT, he might think about calling if he suspects you are on a draw. If he thinks you have at worst KQ, he will fold right away.