Some other suggestions, although not necessary - Travel pillow, chewing gum (especially for those who have ear problems during flight), book and/or ipod and one change of clothing (air lines do lose luggage occasionally)

scuba_Nikki Article on Carry on luggage

For a great view of the city (especially at night) go to the top of the Eiffel Tower at Paris. It also offers a great vantage point for viewing the water show at the Bellagio.

cdm115 Article on Las Vegas Casinos

I bought a high sierra duffel bag - it has a zip down panel on the back and you can pull out the back pack straps…I also have a laptop back pack…

Aussie_Jacqui Article on Suitcase Vs Backpack