Choose your payment processors wisely, it's always good to accept more than one, but be aware of the pros and cons of each. Some will take a bigger cut of the profits, but perhaps offer more security. E-gold is a common payment processor that is on the borderline, to begin with the value of your cash there can go up and down, and requires a 3rd party service to get that $ in your pocket. While Pay Pal and Google Checkout are more convenient. But I believe their fee is higher than E-gold.