there are some tips here http://www.travelinsurancetips.net/

I used moneysupermarket.com to find mine. Have used the same company for the past 3 years now.

Post Office is supposed to b a good one

Try http://www.insuremytrip.com/

You can compare all the different travel insurance companies prices and coverages at the same time. There are plans for both US and non US residents.

First of all who do you bank with, I found that I have free Worldwide Travel Insurance for 2 with my Lloyds TSB Account.

I always used PO before I found this out, never had to claim though so read the smallprint.