What else? Keep garbage covered. You don't want cockroaches for obvious reasons, but they also can trigger asthma attacks. Plus, keep the pollen out by closing your doors and windows, and remember to change the filters in your windows, says Waldron.
Finally, those with allergies should always have injectable epinephrine, like an EpiPen, on hand, she says. And always seek medical care immediately after use, even if you feel OK, since symptoms may return.
For more information on creating a living environment free of allergens and toxins, visit the Asthma and Allergy Foundation of America, the American Academy of Allergy, Ashtma & Immunology, Sustainable Furnishings Council, and the Environmental Working Group.