The best way to choose your foundation is to make sure that you match the undertone of your skin. If you're Asian, there's a good chance that your undertone is yellow, so you want to make sure that the foundation you choose has a yellow base. The best way to pick the foundation is to take a little sample of it, and run it on your jaw line and blend it in to your jaw line.
If it disappears and you can't see it, then you know you've picked the right foundation. If you're overwhelmed by all the choices out there, a great place to go is some place that specializes in lots of variations of makeup. For instance, some place like MAC, they cater to all types of skin and all ethnicities. You're going to have a huge color range, which isn't typical of lots of different brands.
The other great thing about a place like MAC is that you have sheer foundations, you've got medium foundations, full coverage foundation, powder foundations, liquid foundations, and so you're bound to find something that matches your skin tone. It can be really tricky to find the perfect foundation color, and so as long as you go to a place that has a nice range of color, you're going to be in very good hands.