There's lots of ways to save. Usually they involve some level of compromise. discount WDW is why I joiined the DIS!
My number one rule-
time = money!this works both ways- anything that costs you time- better save a certain amount of money.
A few things I have done, some are painless, others are a pain:
1. driving vs. flying vs. renting: lots of times, when I factor all the costs, (which many folks don't do) it might be about the same to fly. It's not just gas/tolls/hotels/parking. Think about what you paid for your car, and how many miles you expect to get. If you paid $20,000 and expect 150,000miles - then not counting things like tire wear/oil changes then the cost to drive is $.13 per mile. If the trip is say - 1,000 miles round trip, then that's over $130 right there. Since you are putting so many miles on the car in such a short time, it may actually be a better deal to rent a car. Again, don't forget to consider the time costs. Both forms of travel have time costs.
2. Food. options are huge...but drinking water, reducing alcohol costs, bringing a few snacks from home can help. I dislike eating from a hot backack, but we often have food in our room. Another problem with backack food is that you have to lug it all day. Eat offsite. Doing it midtrip can be a considerabel time sink, but eating offsite at the airport food court, or on the drrive between MCO and WDW is easy.
3. Spend one night at a value resort. If you pack a day bag, this is painless. It's especially painless if you have a late arrival. It does take time to change resorts, and doe not work so well with free DDP, but it is also fun to see/eat at two resorts. If you drive- that's also another option perhaps-make one of your offsite stays close to WDW, at a place w/free breakfast. (or at the beach!)
4. Avoid weekends. I have saved a bunch going down on weekdays. Hotel rooms are less on weekdays. Play with your dates to get the best deal (like airfare).
5. adjust the length of your trip. So many folks are not at all willing to do this. It depends a little what your travel costs are, but for me, it's an easy way to make a trip fit my budget.
6. Consider a trip to Universal instead of WDW. WDw tickets are priced so that the differnece between four and five days is small- but skipping the parks one day is another way to save a few.
7. The way the dining plan is priced now, it's hard to make it come out as a way to save. At least for us. Also, unlike in years past, they no longer allow you to use leftover QS credits to buy snacks. (Last year we barely broke even because we were able to use up leftover meal credits that way. ) You REALLY have to look at number to see if free DDP is a bettter deal than % off discounts, especialy if the 'free' dining offer is the QS plan.
We usually do better by stretching our meals with sharing. Like one person gets an entree, the other an appetizer. Disney will even split TS entrees onto two plates.
8. Oh if you so buffets- consider that in your eating plan. Like pick a late breakfast ADR to skip lunch. Or have an ice cream lunch before a buffet dinner.
9. consider
AAA membership. In short, my membership pays for itself in discounts alone - some of them are Disney related.