Have you ever stuck with automatically select shipping method in magento ?
For example in this tutorial, we assumed that we had only one shipping method : free-shipping. So, we need to set it as default shipping method and ignore shipping step.
We can make it done with these simple steps:

1/Create app/etc/modules/Inbusiness_Checkout.xml


2/Create app/code/local/Inbusiness/Checkout/etc/config.xml


3/ Create app/code/local/Inbusiness/Checkout/controllers/OnepageController.php


Happy coding !