This will likely be the first opportunity to examine the house without furniture, giving you a clear view of everything. Check the walls and ceilings carefully, as well as any work the seller agreed to do in response to the inspection. Any problems discovered previously that you find uncorrected should be brought up prior to closing. It is the seller's responsibility to fix them.
Clean the lint filter in the clothes dryer after every load to improve air circulation. Remember to regularly clean the lint from vent hoods, too.