There's only that much brain to go around with, the brain, being for the most part a larger version of australopithecus brain, as it is can have trouble seeing itself as a whole (just look at that "akrasia" posts where you can see people's talkative parts of the brain disown the decisions made by the decision-making parts). Why do you expect anything but detrimental effects from deepening the failure of the brain to work as a whole?
Could you expand on this, please? I'm not sure I'm familiar with the failure mode you seem to be pattern-matching to.
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.