What I have taken from this is any time I travel abroad I should get in touch with my stamp investing friend and form a strategy for finding good local deals that have a likely long term value, possibly in other markets, and also I should try to make more friends expert in such collectibles investing for the same reason. I have not concluded I should expect to beat the market without a similar effort.
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.