An energetic real estate agent can have your home on the market in a day. However, to provide the kind of marketing exposure you need to sell in today's market takes a little longer, unless your home is photo-ready when you list.
Ideally, you should start planning for your home sale months before you want your home to be on the market. First find an agent to represent you. Then, create a game plan together for the premarketing phase of the process.
Use your agent as a resource. Walk through your home with your agent to get feedback on work, decluttering and rearranging that needs to be done before the house is photographed for advertising and shown to prospective buyers.