I'm just gonna make a list instead of being chatty... I hope...
1. Buy the Unofficial Guide. Read it, read it, read it.
2. Make your ADR's now. Park hours are posted on wdwinfo.com so decide where you want to be each day.
3. We are not morning people but very happily make use of evening magic hours and sleep in most days. It works!
4. Acknowledge and accept that you cannot see everything in one trip. Make a list of the things you HAVE to see and let the rest go for the next trip (there WILL be one)!
5. Learn to use fastpass.
6. Things to take...(italicized stuff goes in small backpack to take into park)
ponchos, sunscreen, handheld minifans, moleskin, spray-on deodorant for your feet,
water (or a filtering water bottle), extra undies/bras (TMI but if you swim/shower midday you won't want to get back into sweaty underwear AND because of the humidity hand-washables don't dry overnight very well), clothespins to hang stuff on the clothesline in the bathtub,
park snacks (granola bars, gummy things) without chocolate (melty icky mess),
gallon sized ziplock bags to put cell phones, cameras, etc in when riding on things like splash mountain, glowsticks from the dollar store for evening parades/shows, powerstrip if you have many things that need recharging every night
7. The shoe issue... some swear by sweat wicking socks and good sturdy walking shoes, but these make me crazy. We do best in the shoes we wear everyday... in my case,
crocs. DD wears her columbia sandals, columbia flip flops (both with good arch support). DH wears socks/good sneakers or sandals with good arch support. You are going to walk a LOT- maybe 10 miles a day- and spend a lot of time standing around. Wear whatever will make your feet the happiest.
8. Don't sweat... well, OK, literally you cannot avoid it, but don't worry about all the details. YOu could go to WDW with nothing buy your credit card and still have a wonderful, amazing time... I promise!!
Hmmm... said I wasn't going to be chatty; gotta work on that!