Disneyworld in a day. I'm not sure I have the energy for a one day only Disney trip now that we have a toddler but this sounds like good advice to save for later. Although some of the rides are different this could easily be adapted to Disneyland as well.
We packed lunches/snacks daily. Thankfully no one in our group is all about going overboard and wasting time eating! Snacking at Disney World can be expensive. Save room in the budget for other things with these snacks to pack for Disney World.