Crazy as it sounds, I've heard of folks selling plasma to earn extra money (for Disney and other things). I've considered it, but there isn't a place near me.
Save on EVERY LITTLE THING that you can around the house and while it won't be a million dollars, it can really add up! You should easily be able to whittle $10-$20 a week from the grocery budget by shopping smarter, eating a bit differently, using coupons, and less impulse buying. And another $10-$20 a month (or even a week) can be saved by changing habits such as a daily latte fix, take-out meals/snacks, and by packing lunches from home.
Watch EVERYTHING that you are spending money on (meals out, movies out, hobbies, sporting events/concerts) and my guess is that you could save close to $100 a month by just making some changes. And provided that the $100 doesn't need to be used to pay off debt, it can find its way into your Disney savings account!
Use your Discover card or other cashback rewards card and put the money saved towards Disney (provided you pay it off in full every month). Give up an under-used or unused gym membership (nice weather for walking/running now anyway), sell/consign unused things from the home (Facebook has tons of yard sale pages around or have a real yard sale), check on your home owners insurance and/or car insurance and see if any changes can be made to save some money. We recently added a third car (for the kids) to our policy, but by making some smarter choices about the policies overall, we were able to add that third car and only increase our yearly premium by less than $100!
Take surveys online in your spare time. Babysit when you have a free weekend, get a temp job or find a work-at-home job that you can do in the evenings/weekends.
BUY LESS!! Stay out of the stores/malls! Easier said than done for those who like retail therapy.
Turn off lights, turn down the heat and a/c, hang clothes out to dry, use the oven less and save on the electric bill... the extra that you would usually spend.... straight to the Disney account!
Most of these sound small, but they can definitely add up, especially over the course of a year! Good luck................P