✔ 最佳答案
Bring warmer clothes for nightfalls, expect huge difference between daytime and nightime temperatures.
If you are used to Asian brand cosmetics, skin products, make sure you purchase them before you head over, you may not find a suitable replacement (for a budget price) before your "import" supplies runs out.
As long as your phone is GMS and SIM friendly, you can use your phone anywhere in the US. You may consider a "pay as you go" plan, although for long term stay with Long Distance calling in mind, go shop around for a fixed plan. You'll need an adapter for your HK electronics.
Home Stay:
1) bring your usual non-prescription (over the counter) HK medication, you might not adapt to US over the counter medication.
2) check if you're close to the Seattle Chinatown district, check
http://www.chinatownconnection.com/seattle-chinatown-international-district.htm
if you lucky and happens to be close to Chinatown, you won't have to bring a lot of things with ya, but if you live kinda far, bring things that you use in HK (all the time) and cannot be replaced in Seattle by a North American counterpart.
GOOD LUCK!!