I know how to project voice, and I do it when singing all the time, but I always forget to do that in normal conversations.
@army 1987, it is the difference between knowing how to do push ups well, and run well, and do situps, and being strong in the sense that a blacksmith is strong. One is a sort of ability to perform a bounded activity, the other comes from constant use of the muscles in question over time. When you've done the right exercises, you don't have to remember, you're just strong and you have a life which makes you stronger every day.
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.