Sunscreen application is a no-brainer, especially when experts advise us to wear sunscreen daily, even if we plan on spending the whole day inside, and are still supposed to reapply it every two hours ...

Your standard Post-it note is a one-sided, single-use affair. You’re free to flip it over and write on the back, of course, but then you can’t actually stick it anywhere. The folks at EcoStatic Inc.