Partitioning my 1tb

Before I ask I need to preface this by saying I have no other option but to have a 1TB drive be a boot drive. Anyways I just wanted to ask really quickly what you people think is the best idea for partitions on my 1TB drive. I am going to be installing XP pro, and I wasnt sure how a system/data/programs idea should be setup.

Thanks in advance ;D

>>4

What do you mean backup the whole hard drive?

Sorry, I am still confused. I want this to work because in the past I havnt been able to fix windows without destroying important information because of bad partitioning and no paritioning at all.