IPad doesn't work well, i wanna make iPad files backups (music, video, photo,email contacts, books), how?

i hear that apple iOS 5 system operating has released, with my iPad 2 i wanna get updates with. However I VERY worry about my so many files in iPad will be lost while syncing newly. So now first i wanna a program can help me how to make my ipad files on pc. Give me The TUTORIALS.