I'm strongly tempted to provide anecdotes related to this, and was halfway to the reply box before I caught myself and remembered how tied up this is in my personal brand of weird.
Suffice it to say, I totally believe that standing erect and facing forward is better for mood/confidence overall. (And that believing this is not sufficient reason for me to do so all that often.)
This sounds interesting. Could you say why this isn't enough reason for you to stand erect and forward-facing more often?
Thus spake Eliezer:
It seems that many here might have outlandish ideas for ways of improving our lives. For instance, a recent post advocated installing really bright lights as a way to boost alertness and productivity. We should not adopt such hacks into our dogma until we're pretty sure they work; however, one way of knowing whether a crazy idea works is to try implementing it, and you may have more ideas than you're planning to implement.
So: please post all such lifehack ideas! Even if you haven't tried them, even if they seem unlikely to work. Post them separately, unless some other way would be more appropriate. If you've tried some idea and it hasn't worked, it would be useful to post that too.