Quoting from [ShadowC]:
I new with this, I see payment with T/T, wire transfer, L/C, credit card, and more. What does all those mean? I only know credit card.
Credit Cards are generally not used in international trade. There are many payment methods available, and you should decide which one is appropriate for your situation. Here's a link to some information detailing payments:
http://resources.alibaba.com/topic/18606/4_Best_Payment_Method_and_Incoterm_.htm