The National Archives' website has plenty of information about good archival practice. Read about it here:- Caring for Archives.
If you fancy a career as an archivist, why not contact one to tell you what the job entails?
Our own Archives Officer would be happy to tell you more about his work here in the Royal Conservatoire of Scotland. We don't just conserve papers - we have music, musical instruments, costumes, paintings and more!