Spring allergy season is coming. If that's bad news for your family, take precaution now before tree, flower, and grass pollen reaches its peak. Stop pollen at the door by laying down double door mats—one outside and one inside—and ask guests to remove their shoes as they enter. Also, swap out heavy drapes for lightweight curtains that can be machine washed. Lastly, air filtration is key; invest in a HEPA air filter, or upgrade to a vacuum cleaner with a HEPA filter attached.