Neti

I use a neti pot, though not often enough, for cleansing the sinuses and nostrils and keeping colds and allergies at bay. Just two years ago I began experiencing sinus pressure, pain, and occasional blockage. It's really hard to do ujjayi, single or alternate nostril breathing when you're stuffy!

Neti is part of an ancient Ayurvedic purification process. Here's a great link to usage of a neti pot, complete with an instructional video. It's really only scary the first time, but if you breathe normally through the mouth while doing it, you will feel more relaxed and at ease during the process.