The first thing to to do is walk yourself through the process of adding the responsibility of running an e-business to what you're already doing.

Who will fulfill orders?

Who will reply to customer-service inquries?

How will returns be handled?

What about shipping?

Will you accept credit cards? Do you have a merchant account to do so? If not, how will you obtain one?

It might be helpful to have a friend place a mock order and invent potential scenarios a customer might present. This will give you a solid feel for the processes and procedures you need to have in place.

Good luck,

Lena