Untie a Delivery Bag Knot, Open Blister Packs, and Stop Blisters

It can be hard to muster the patience for fiddling with a tight knot, but with some basic knot-untying knowledge you can do it with your own fingers. The key to successful knot untying is to twist and push, not pick: twist one of the ends of the bag handles into a tight, solid form, then push it through the knot to get to your dinner.

That hard plastic packaging, known as a blister pack, was introduced to deter shoplifting, but as a consequence of its tamper-proof features, it's also known to cause injuries when consumers try to open it. Put down the scissors and the knife and give your can opener a go instead; it's similar to some of the special tools on the market designed to open these packages, and it actually works. You probably have at least one in your kitchen right now.

There's an easy way to prevent friction blisters without buying special socks or shoes: a study conducted with cadets at the U.S. Military Academy at West Point found that applying antiperspirant to your feet reduces your odds of developing foot blisters. Friction causes blisters, and when your skin is sweaty or moist, you increase that friction and the odds of developing them. Antiperspirant fixes this because it's made to reduce sweat, in this case on feet instead of underarms.