Work with an agent that understands and utliizes online marketing to achieve best results. Maximizing the explosure of your home, particularly on sites that have no "bricks and morter" bounds - like Trulia, Zillow and Realtor.com for starters - will reach potential buyers across the nation. There are also a select group of agents that have international reach - ask your agent about that as well. The world is getting smaller every day and your buyer may come from anywhere. You want your reach to be as broad as possible. Work with an agent that can achieve that for you.
All that said, if you price incorrectly, no amount of reach will cure the issue.
Good luck and best,
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