mine is very organized. i can freshly reinstall an OS and have everything back to the way it was before the reinstall.
basically OS and programs on the 10GB partition, My Documents on the 20GB partition, and MP3 on the 30GB partition. to make sure i dont forget programs to install, i keep a list of what order to install the programs along with every EXE file i need to install so i wouldnt need to redownload the programs i use.