apartments
It must be a part of God's plan for me to be stumbling over your post at 5am after no sleep hehe. I have life experience that might help you get it rented out, and cover you from some mistakes others make in this area.
0) Find out *exactly* what it would cost to just break your lease (minus any deposits you're going to get back) and see if your mortgage financer would be willing to increase your loan by that amount. Very often an apartment will only charge something like a month's rent and a 500 dollar fee. Sure it sounds rough, but it beats paying three or four month's rent in most cases and to a bank that already has its claws into you for the price of a house, it's chump change to add that into the overall loan. Many banks will negotiate around five *thousand* dollars for "things you didn't think of" in addition to your existing loan amount, without raising your payment or interest rate. (This of course depends on your credit and a bunch of other factors, but the worse they can do is say no).
1) If you have a military base near you, go to the front gate and ask the guard to whom you would speak about advertising your apartment as military housing. Bases *ALWAYS* have people coming in who need quick crash leases and military folks are often quite happy to take on sublets because it's way cheaper than a month-to-month lease. You can even work out an under-30-day contract with them where the *base* takes over your rent payment and the apartment is or is not used the same way they use long-term hotel rooms (they usually only do this for furnished apartments).
2) If you have any colleges or universities near you, contact their department of housing or student services and ask if they have any "on campus" ad sites where you can freely list the apartment as being open for sublet.
3) Check with any local large corporations in your area. Places like Microsoft, Mead, Hershey, and any other large corporation you can name will often have people that handle arranging housing for them. Usually they put them up for 125.00/night in some place like Marriott Residence Inn -- start with the human resources dept and offer them your X sized apartment for just 50/night and you cut thier costs in half. Again, this usually only works if you are providing a furnished apartment, but it can be sparsely furnished.
4) BEFORE you sublet your apartment, make absolutely certain that you are allowed to do so within the terms of your lease. Many lease contracts today include clauses wherein you promise not to sublet. If you sublet when you have signed a contract saying you won't do so, it can lead to some *serious* legal problems. Also keep in mind that you want your own contract to be carefully wored so that your "tenant" is responsible for any damages or violations and not you. Even then, your apartment complex will still hold you responsible for any problems, whether or not you can get your subletter to own up to them.