You asked about alternatives to the usual marketing avenues and there are more available to you as your flexibility increases. Here's what I mean:
Agents are restricted to the way they market a house on the MLS. We abide by Fair Housing and other industry rules that you as a private owner/seller aren't bound by. Even if you have an listing agreement with your agent you are still entitled to market your house with some of your own efforts. Remember though, that even if your efforts get the house sold, you will probably still owe your agent thier commission.
That said, you probably have a good idea (since you've lived there) who your target market is going to be. Just look at the demographics of all your neighbors. Once you figure out who you'd like to target your advertising to, go to where they are and put up flyers, cards, signs, blog posts, tweets, or whatever will get their attention. Most likely, you'll be able to highlight some buzz worthy things about your house that your agent might not be able to. When in doubt about what those things are, ask your agent.
As for being even more flexible, a few agents who've replied to your question pointed out the all-important PRICE. What hasn't been mentioned though is another big thing that attracts buyers: TERMS. There's a saying in the investment world that goes "I'll pay your price if you accept my terms." As people will point out to you, it's a "buyer's" market right now. But don't forget that another market dictates what buyers can and can't do and it's called the financial market. Many would-be buyers out there are having a hard time getting financing due to increased lending scutiny -- higher down payment requirements, credit score criteria, income verification, etc. Ask a few mortgage brokers if they've had to turn away more people recently and they'll probably confirm this for you. Advertising more attractive terms is a way to make your house stand out and appeal to those buyers because they are in a market pool that not many sellers are currently catering to.
But again, offering attractive terms will depend on how flexible you are in your current situation. It'll also depend on the quality of the guidance/options you receive from your agent or others you can find who know what they're doing.