Frequent flyer miles: Whats the best card going? I travel to both SEAsia,

[slim]

Carbbean, and S.America.? Do you have to keep a balance to get miles or can you pay your card everytime and still get miles?

If you used the miles card to pay bills, can you still get points for that...?

Whats the best spending strategy to get miles miles....

I never keep balances on my cards....