Lindsey Ellefson is Lifehacker’s Features Editor. She currently covers study and productivity hacks, as well as household and digital decluttering, and oversees the freelancers on the sex and ...

We humans sometimes use a memory technique called chunking. For example, with phone numbers we usually remember the three-digit chunk and the four-digit chunk. Two items instead of seven. “Well, the ...

Think of how easy your job would be if you were able to easily memorize information that you often find yourself having to refer back to. For memory athletes, people who compete to commit long ...