1. Keep the grass short, but have someone else do the mowing. If you can't avoid yard duty, wear a pollen mask.
2. Avoid humidifiers and keep humidity levels below 50%. This may require a dehumidifier in areas with high humidity levels like basements.
3. If you have "hay fever," stay indoors when pollen is high. Pollen is worst during early hours and on dry, windy days.
4. Avoid "ionic" air purifiers and change furnace and air conditioning filters on a monthly basis.