Adding and removing

You know, once i create a website for a client, what do i have to search for tutorials…
for to add and remove pages, and add and remove audio and videos and images…

So that the client can do everything with out comming to me…

What do i need to learn for that.?
I mean i can create a website from start to end including filling the forms…
but adding and removing pages,and adding and removing audio,video, and images to the list…

Can anyone write down the list or give me a link where to learn it from, even better if there is a video tutorials i have to buy …?

Thank You very much for your time guys…