Have a "pollen dumping" room in your home. In other words, have an area that you leave your outdoor clothes (after gardening, exercising, etc.), and change into a clean and pollen free wardrobe. In this way, you won’t be spreading the clinging pollen grains throughout your house. Also, pollen tends to hang onto the hair on your head and body, so a quick shower to rinse away those travelers will go a long way to keep the pollen counts in your home at very low levels.
How much do you know about common seasonal allergies? Find out about common seasonal allergies in this article from HowStuffWorks.