Temporarily clear up a stuffy nose

Looking to get a few clean inhales through the nasal passages? Do this, and be firm. It usually works.
1. Push your tongue against the roof of your mouth and hard as you can.
2. Take your thumb (since it has more surface area than any other digit) and place it where your uni-brow may or may not be, with the tip of your thumb pointed down and against the bridge of your nose.
3. Push your thumb into your face, and keep you tongue rigid against your palate.
4. Hold it for as long as you can.
5. Release and breathe easy!

All the pushing and squeezing helps open up your nasal passages, allowing you to breathe!