The value of the services that you provide to your customers is something that may be difficult to price at first. You may or may not know how much you should be charging for your particular services. If you find that you are having any difficulty with this, then you are going to want to run a services price list on Excel.
This is the best way for you to be able to get the prices that you should be charging for various services. It is basically just taking information you already have and making sure that you are using it properly to find the right price.