Tips on packing light:
Pick a color scheme and stick with it. Everything you bring should match everything else. Bring mostly neutrals and maybe one or two complementary colors.
Think about stuff that does not need to be ironed. Wrap dresses are great, as all kinds of knits.
Also bring a couple of casual/loungy things.
Go really easy on shoes. Two pairs, max.
Yes on a travel adapter. I use a universal adapter with a lightweight power strip; can plug in computer, phone, and backup phone battery all at once.
This + this:
http://www.amazon.com/GSlife-Portable-Universal-Including-Smartphones/dp/B00P3BK3DK
http://www.amazon.com/Kikkerland-UL03-A-Universal-Travel-Adapter/dp/B00210MRGC