As a lifelong allergy sufferer, I watched with a combination of fascination and revulsion, when the Neti pot was demonstrated on an Oprah show with Dr. Oz. Neti is an ancient practice of nasal irrigation.
You fill the little pot with warm water, stir in a little sea salt (think tears), tilt your head over the sink, insert the pot into a nostril, and the water flows through your sinuses and comes out the other nostril. Switch sides. Gently blow your nose and say 'ahhhh'.
It takes a few minutes to get the hang of it. Seems a little freaky that it comes out the opposite side, but trust me, it does. It works best when you relax and let it flow.
During heavy pollen days, flush after working outside. This time of the year when the indoor air tends to get dry, and you wake up feeling like someone stuffed your sinuses full of cotton, the Neti provides instant relief.
You can get Neti pots in most drugstores. Don't spend the money on 'special' salt - use fine sea salt, not table salt, from the supermarket.
I recommend the Neti pot to anyone who feels stuffy, and have had many converts join the fan club.