•Hand sanitizer and wipes. Sanitizer is great for when you get off a ride, but wipes are great for those sticky messes.
•Nail clippers - great for their intended use, but also helpful for removing price tags from those souvenirs you want to use right away!
•Don't forget your prescription medication, but things like Tylenol, benedryl, medication for diarrhea and constipation can be helpful. Bandaids, cortisone cream and triple antibiotic ointment are great to have when you need them.
•Zip lock bags come in handy- for snacks, keeping things dry etc...
•Epsom salts or Epsom salt gel to help with those tired feet at the end of the day!

•Bands for keeping your magic band in places- they tend to pop open and these bands you can purchase online will keep you from losing your expensive magic band.
•Phone charger - and don't forget the cord!
•Personal rechargeable fan and cooling neck cloths can be a lifesaver in the heat and humidity. These are sold in the parks, but bringing your own from home will save money.
•If you wear glasses then cleaning wipes are a must- between sweat and water rides you glasses can quickly become dirty.