There are a lot of lifehacks out there and not all of them are very practical. Most of the time, people seem to be aiming for "impressive" or "cool" when coming up with them.
And that's fine. Cool, impractical hacks can be a lot of fun, but they don't help much in a normal, everyday life.
These are different. They may not be the sexiest hacks, but they can make a small difference in anyone's life.