Bring durable luggage that is also light and fitting within size limitations. When buying luggage in Europe, bring a tape measure to ensure the size of the bag and do not rely on the manufacturer's size. I would not recommend using a 4 wheel bag because they don't work well on uneven surfaces like cobblestones. Two wheels are better.
Delta Baggage Limits
Baggage may not exceed 45 linear inches in combined length, width, and height and must fit easily in the Carry-on Baggage Check, which is located near the check-in counters and at the gate and is approximately 22" x 14" x 9." Delta's checked bag limits is 50 pounds and 62" total (length+width+height).
The one I highly recommend is the TravelPro Carry-On Bag. You want to maximize size without going over. The one above is 40.5" total dimensions and Delta permits 45" so with some expansion, it still should come in under size.
I would recommend this deal. This is the best luggage for international travel in quality, size and price.
"Signal" Luggage Lock
This is combination lock that accepts a TSA key. A red indicator pops up if TSA opens your luggage alerting you to the fact. Signal Luggage Lock
These are extremely convenient for maximizing space and keeping items orderly. They allow you to "shift the weight" as needed between carry-on and checked bag. If a suitcase falls open (or is inspected) it's very easy to repack. Two sets carry most of your things. Packing Cubes
AT&T calling rates in countries visiting
|Country||Regular/Minute||AT&T World Traveler Plan|
Skype with a 4G phone or your laptop if you have a video camera in it.
Maps on Your Smart Phone
Students, note: very good to use for subway stops in each city we visit.] Cheap Maps can help you find subway stops within Europe. Simply use the Google maps app that comes with your device and then take a "Screen shot" (Home button & power button pushed simultaneously) of the parts of the map needed, in any level of detail desired. It is saved as a photo which you can access any time without the need for WIFI. You can also do a directional search with your precise end point, and it will give you step by step instructions/maps that are very accurate. Take a screen shot of each step and you're good to go without WIFI.
Students, make sure that you get one of these money belts below for portions of the program. You will need it in Paris, Rome and possibly London. Always be aware of possible pickpockets in congested areas. You will want to keep a separate credit card in there, your passport, money, any other important items. Take a very small bill holder that only has room for a driver's license, a couple of credit cards, and some money. ALWAYS keep it in the left front pocket and when in a crowded area, keep your hand firmly on it. In Paris and Rome especially, this is highly recommended. You could easily be a victim if you don't heed this advice.