Take a bath at least once a day. Showers are great for getting clean, but sitting in the tub is the best way to soothe and moisturize your skin. You do not need to limit yourself to one bath a day. If you find that it helps, take as many baths as you need to.
Avoid feather pillows and opt for a pillow that is less likely to attract and keep dust mites. Foam pillows may be a better choice for you and you can also invest in pillowcases that help keep dust, dust mites and allergens from getting into the pillow in the first place.
You may already know to change your sheets frequently but have you considered your curtains? Your curtains can attract a great amount of dust over time and that dust is released in the air whenever you open and close them. So you should wash them frequently or invest in some that are easier for you to wash.