In the four big catagories there are only so many ways to save.
Tickets:
10 day no expire water park & more tickets - These tickets give us 20 days of fun to spread out over 3 or 4 trips. It was a big cost outlay up front, but averages out to less than $200 per person per trip for my family. I bought mine 2 price increases ago and so far we have used them twice.
YES tickets - While not as good a discount for the adults as a couple of years ago, the discount for the children participating in the classes is still pretty good. I see you are going child free at the moment so file this one away for later.
Undercover Tourist
Miliraty Salute tickets (if you are eligible)
Lodging:
Off site - search for a great deal for the week at one of the timeshare properties (Wyndham Bonnet Creek in actually inside the Disney gates) or check out renting a house or condo at nearby Windsor Hills.
On site - Look for special offers like Free Dining or room only discounts. Values resorts are big enough for a party of 2, don't pay for more resort than you need. A PP also mentioned camping at FW.
Food:
See Free Dining above.
Buy Disney gift cards ahead of time - I usually buy one $50 Disney gift card a month for about a year and a half to use for food. If I buy it at the grocery store I get fuel points for free gas. You can also buy them using the Target Red Card and get 5% off (mentioned by a PP).
Bring some of your own food. Eat some meals in your room.
Getting there:
Fly - Frequent Flyer Miles for flights, or wait for fare sales or stalk Priceline type sights.
Drive - You can use some rewards points or sites like Priceline or Hotwire for hotel stays during the drive. Also use some of that free gas you racked up buying Disney Gift cards.