Have you ever attended a boring and grueling meeting? We bet you have. Endless sessions on nothing, where you don't even have to sit down anyway, are one of the flaws of the modern age. The time spent in unnecessary meetings of this kind can naturally be used more efficiently. For example, developers want to develop, not waste their precious time in useless discussions. I know from my own experience that a few simple tricks can make a big difference and help to make people leave your meetings with a feeling that it was time well spent.
