Instead of hoping to find the one Super Cool Trick that'll let you become a superhuman overnight, read five or so (scientifically minded) self-help books addressing the biggest problem area in your life, make a moderate to large amount of effort to implement the knowledge in your life, and then repeat for your other problem areas, until in a year or two you become a superhuman.
This worked for me for productivity and depression, next is social skills/social anxiety.
Can you share which books worked best for you regarding productivity and depression?
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.