Exit Sign Placement
While this is common knowledge to seasoned drivers, newbies on the road have a lot of trouble with this. The alignment of exit signs along the highway isn't random. They tell you which side of the road the exit is on, the left or the right.
Free Fabric in New Clothes
If you're handy, that extra scrap of fabric that sometimes comes with new clothes is actually meant to be used to sew up any holes. Or, you can wash those extra pieces to see how well your detergent reacts to your new clothes. Either way, it serves a purpose you probably never considered.