You know that fried feeling in your brain at the end of a busy day? That mentally exhausted, hard-to-focus, hard-to-transition-out-of-work-into-your-evening-roles feeling? That feeling like you’ve been smoking weed all day or just woke up from a first-night-of-vacation hangover? That feeling is from multitasking. Multitasking, or the constant switching from one task to the other, lowers your IQ by 10 points! (Comparatively, actually toking ganja lowers your IQ by only 5 points!) So, as the University …