Sitecore provides nice pages for admins to make their lives easy. Have you heard this before? If no then go to this nice article [I am not writing article again by following DRY rule]
http://firebreaksice.com/sitecore-admin-pages-explained/
Really helpful!
Happy Coding! 🙂
Sitecore basics! 
hey there!
Nice post. Keep it up.
Thanks John!