If you really feel the need to routinely reformat, I suggest putting all your stuff on different partitions.
In Windows it is a bit more tricky, but I know that it is still possible, like in Linux, to mount partitions to directories anywhere on your drive to allow for you to have, for example, your My Documents folder in a totally different partition from the rest of the C: drive.
In Windows it is a bit more tricky, but I know that it is still possible, like in Linux, to mount partitions to directories anywhere on your drive to allow for you to have, for example, your My Documents folder in a totally different partition from the rest of the C: drive.