Summarize this article:

Put your sheets, pillowcases, and blankets through the wash once a week. Wash them in water that is at least 130 °F (54 °C). Cooler temperatures will not kill off the mites.  If you own bedding that cannot be washed hot, put it in the dryer for 15 minutes at 130 °F (54 °C) or higher to kill the mites. Dry your bed linen in the dryer. Dust and pollen land on line-dried sheets. Clean comforters and pillows 2-4 times a year. Buy dust-proof, or "allergen-impermeable," covers that zip to completely seal your pillows and mattress. Opt for mattress covers that will encompass your entire bed, including your box spring. Get covers for your pillows and for your comforter as well. Clean your covers as specified by the manufacturer.  Covers made of non-porous fabrics such as vinyl or plastic tend to be cheaper, and are highly effective. However, they are likely to make your bed feel hot and stuffy. For an effective and breathable option, consider a microfiber polyester cover, a cotton cover with a laminated nylon layer, or even a very tightly woven cotton cover with a high thread count. If you have had the same pillows and mattress ever since you could remember, it's time to dispose of them. Replace your pillows every 5 years, and your mattress every 10 years.  Get rid of your mattress by trashing it or recycling it. To recycle your mattress, contact the manufacturer for help, or get in touch with your local recycling center. If your mattress and pillows are still in good shape, consider giving them to someone you know who isn't allergic to dust mites. Remember, dust mites are only a problem for people who are allergic to them. Latex pillows and mattresses are inhospitable to dust mites. Latex can be expensive, and not everyone finds it comfortable, so be sure to spend time testing it out in the store before you bring it home. If you don't like latex pillows, opt for wool or silk pillows, as these are less friendly to dust mites than cotton and down. Stuffed animals, decorative pillows and other fabric objects can become infested with dust mites. Launder what you have in hot water. Store these objects in another room, if possible, as any fabric in your room is liable to affect your allergy.

Summary:
Wash your bedding with hot water weekly. Cover your mattress and bedding with dust-proof cases. Get rid of old bedding. Replace your old bedding with hypoallergenic options. Remove any excess objects from your bed.