Here's a few things we never go without on our trip to
Disneyland.
1.) Wrap a fair amount of duct tape around a pen or pencil, and if you need some super good tape, you have it, in a very small pack.
2.) Bring extra outlets - such as a small plug in power bar so you can recharge electronics, etc. Many hotels have limited plug ins.
3.) Bring along a magicjack and spare small phone with your netbook or laptop - then you can phone anywhere in North American using your laptop and phone.
4.) Bring along an extra long Ethernet cable - though places like Howard Johnson's can maybe loan you one, it's handy to have your own extra long cable for their wired internet.
5.) BRING A SANDWICH BAGGIE!!!! (To place the remote control in. This is one of the dirtiest items you can hold. That, and the phone.) Which brings me to my next item....
6.) Bring some sanitizing spray or wipes, to wipe down hotel door knobs, phones, light switches, toilet flush levers, etc, fridge and microwave handles, etc. I always think it helps if the family that stayed ahead of us had colds, flus, etc.
7.) Rubber wedge doorstop - If staying in a connecting room where you want to wedge the kids room door open, etc. (One could use a heavy weight such as luggage though.
8.) Nightlight if you want to - we usually keep the bathroom light on with door open a crack but many hotels have the auto fans so can be noisy to do that.
9.) EAR PLANES if you are flying - help SO much for adults and children to relieve painful pressure in ear from flying.
10.) Hotel info., including all email correspondence printed up, hotel points cards.
11.) An extra bag such as foldable fabric bag in case you pack too much and can't bring all your Disneyland goodies, (tigger tails, fudge, souvenirs) home.
12.) ANTI-BLISTER balm for feet! Avon makes one, there is a sports company that makes another.
13.) COOLING foot lotion or spray - this helps IMMENSELY after a long day's walk at DL Resort and back to hotel. (ADVIL helps too!! Taken during the day.)
14.) Gravol, or other anti-nauseant if you are prone to motion sickness on rides.
15.) COUPONS for various local restaurants that you can sign up for a couple weeks before trip. (Denny's, Mimi's.)
16.) Small flashlight in purse or carryon, etc.
17.) Small fanny pack (I know, they look ridiculous) or something else to carry daily supplies in.
18.) Large ziploc bags to store dirty laundry, keep souvenirs together, etc.
19.) Water wings - if your child needs them or can use them.
20.) Yes, dollar store ponchos are great for the splash-y rides.
21.) Small little unique gifts for housekeeping staff, etc. What kind of Canadian Treats do you guys think would be appreciated? I have heard Aero chocolate bars are a treat. They don't make those in the USA do they?
22.) Tweezors (For slivers if you get one.)
23.) HAND SANITIZER!!!!!
We do this after every ride. Seems silly, but makes us feel better. We also make sure to sanitize our seat area on plane before takeoff.
24.)Photocopy your passport and leave it with someone who is not traveling with you.
25.) Light windbreaker type of jacket.
26.) Small headphones (ear buds) for plane ride if there is a TV onboard.
27.) Phone your credit card companies before you leave for your trip, so that they won't un-neccessarily block your card should a sudden charge show up in a location that they know you don't live in.
28.) Antibacterial ointment such as polysporin, for small cuts, etc.
29.) SPARE SHOES!!! You can alternate day to day, or morning to afternoon. MAKE SURE you have shoes that you have already broken in very well!!
30.) Lollipops or ring pops for on plane for small children - it is said that the sucking motion is better than a chewing gum motion to alleviate ear pain.
I 
a good list!
I also bring slippers for all family members and do not allow them to walk barefoot on the floors. The floors are usually cleaned once per year- if that.
