Partition Wizard is a program that can take care of this awful task for you when the time comes.
It is a completely free program that allows you to partition your hard drive in an extremely easy way. The way it works is practically identical to the classic Partition Magic. All you have to do is select the unit you want to work with and choose the option you need: partition the disc, resize, copy, hide or delete partitions, explore the discs, and even change the assigned letter for each unit. You can do everything.
Partition Wizard supports 32 and 64-bit operating systems, and works with Windows XP, Windows Vista, and with the first versions of Windows 7.