I have come to realize that a lot of mental energy and focus is wasted on the intake, filtering, and processing of what ends up considered completely useless sensory input. Things like various types of extractions, emails, people trying to sell you stuff on pretext of trying to help, billboard signs, junk mail, B.S. bingo, verbose communicators, false alerts, paranoia propaganda and the list goes on in the hyper age of information we live in. Heck, maybe even this post is irrelevant and you just wasted 10-15 sec (I hope not).
I have also come to realize that my mental energy and attention are very finite and limited -- therefore a second wasted on processing useless stimuli is a second never to be recovered. I want to improve my ability to discern deserving targets of attention focus. Part of the reason is that, due to some cognitive patterns, I easily fall into sensory overload state (if there is too much auditory or visual input to be processed, I quickly run out of RAM and become confused and disoriented -- but if the amounts of data are reasonable, I do fine). So I would like to develop internal heuristics to weed out external garbage that comes to me and retain good stuff as much as possible.
Of course, such an approach, if carelessly applied can be hazardous to your executive functioning, work, relationships, even life. E.g. you just decide you can take paying attention to only two other vehicles on the road will likely get you killed. So I am looking for some scientific studies how to optimize and streamline your cognitive functioning by safely and carefully "cutting corners" in your sensory intake.