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

This is a FANTASTIC tour for a city person. The shopping, dining, nightlife, and cultural opportunities are limitless as each city seems to outshine the last.

Angie Article on Best of USA (Tour)

I went alone last summer (06). I met some wonderful people…I liked it so much, that I am going on the London + Paris trip next week (alone again).

Liza_peral Article on Travelling alone