This app puts notes on the lock screen—and that single change makes it surprisingly effective.

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 ...

Opinions expressed by Entrepreneur contributors are their own. Do you feel extremely overwhelmed from looking at your to-do list? Do these tasks feel infinite and impossibly daunting? Do you dread ...