Paint, strong cleaning solvents and other hazardous materials should be moved to a shed disconnected from the house. The fumes can get into the house and cause headaches and worse. The basement too while you're at it. You hate dusting knick-knacks anyway. Consider packing them away, at least until spring.
Dust aggravates allergies which lead to headaches.
Other things you just can't do much about. Formaldehyde, for example, which is found in furniture, building materials, and synthetic carpeting. I'm seriously considering taking up all the carpeting in my house. It covers every floor but the kitchen. According to a special legislative commission in Massachusetts, indoor air pollution is responsible for half of all illness.