My dad is a landlord and he usually will let tenants out of leases if they let him know ahead of time, promise (and keep the promise) to move in good standing (paying rent on time, keeping the place clean and not leaving things broken), return all copies of the keys, and sign a paper nullifying all their part of the lease (meaning they are releasing the house or apartment back to the landlord/manager). I strongly suggest talking to your manager or landlord as soon as possible. If you are not in good standing, they may agree just to hurry and get you out. If they will not let you out right then, you may see if you can transfer the lease to someone else.
If that is not possible for some reason, consider finding some people who need temporary storage for items and store them for a fee for the remainder of the lease in exchange for partial payment of the bills, but make it clear they have only that long to pick the items up or you have to get rid of them. Have an agreement where you can sell the items if they do not get them in time. I've heard of a few people handling it this way, but it can get sticky, so try the other ways first. Good luck!