Like A Boss: Universal Rules For Looking The Part

Robin Hanson & Kevin Simler may understand this... 

Borrowing heavily from my memory of an article I believe I read in Fortune ("acting like a CEO" or something) about 15+ years ago. You can take this as advice, observation, criticism, or any way you like. I am not singling anyone out in particular, but if the shoe fits...

1. Laughter is poor form. Shows a lack of control. At best smirk with a "hmph", which could be mistaken for a throat clear. If a slight chortle escapes, shake your head as if to deny the appropriateness of it. Any accidental laughter should leave witnesses unsure if you thought it humorous or thought it humorous that one would think it to be humorous. Never, NEVER giggle.
2. Avoid any hint of sarcasm and give no indication of any appreciation or even perception for it. 
3. Refrain from eating sweets in front of others. Act as if to show the slightest attraction to a dessert is to yield to all childish pleasures and reveal a total lack of control. 
4. Your enthusiasm is just matter-of-fact support for those things self-evidently worthy of praise. You are a charter member of Team Winners. If "they" fail to succeed, it is simply due to some lack of confidence they shamefully did not possess--a concern you had all along. 
5. In circumstances when normal humans are overcome with visible worry or anxiousness, you are overcome with calm. Emotions are for the weak. You are a stoic. 
6. If asked to give a solution to a hypothetical problem, instead of a direct answer just reflect poignantly on how you would build a process for avoiding such dilemmas from the start. If asked to give advice, challenge the presumptions behind the question. Never waste an opportunity to obfuscate and go meta.
7. Never bring your own copies of materials to a meeting. If it is important enough for you to need it, it is important enough that someone will provide it. 
8. Play dumb if you can use that to your advantage to put an adversary or underling on edge.