What are the two most important factors when selling a home?

Price and condition are the two most important factors in selling a home, even in a down market. The first step is to price your home correctly. Use comparative sales information from your agent, or pay for a professional appraiser (usually $200 to $300), to objectively evaluate your home's worth. Second, go through the house and repair any obvious cosmetic defects that could deter a buyer.
In a down market, you may have to consider lowering your price and/or making a major repair, such as replacing the roof, in order to lure a buyer. Also, make sure that your home is getting the exposure it deserves through open houses, broker open houses, advertising, good signage and a listing on the local multiple listing service or online listings provider.
If this isn't happening, take it up with your agent or agent's broker. If you are still not satisfied you are getting the service you need, you may have to switch agents.