HI Lisa! I'm glad to hear you are ready to plan a return trip! I love planning trips to Disney and often day-dream about visiting - if I don't have a real trip to plan!
Looking at the information on Mousesavers (historical data), it appears that fall discounts start being announced in late March. Different discounts are announced throughout late spring and into early summer as well. The exact dates of these promotional releases will likely vary somewhat, but its a good idea to be on the lookout early!
There is a variety of discounts available for saving money on your Disney trip, so be sure to check out the different options. For example, there were multiple discounts that spanned this past fall - some were for discounts on a room only reservation (no tickets, just your resort stay), discounts for Disney Visa members, and also a promotion which included a free dining package. It may take a little math to figure out which discount works best for your family!
A good place to keep an eye on is the Special Offers page of the Disneyworld.com website. It can be found
here and lists the current promotions.
And one last note - if you have a current reservation booked with Disney and a better discount comes out, give them a call. More often than not, you'll be able to take advantage of the new promotion.