Amidst all the work you need to do in order to successfully deploy SharePoint, there are two facets you must get right: consistent branding and streamlined permissions.
Whenever you are releasing anything new, you want to make sure you put your best face (and foot) forward. This means you must have the right branding consistently across every page and site you deploy with SharePoint. You also need to ensure the right people have the right access to the right sites at the right time. This can be difficult to do on a one-off basis.