Ubuntu – back up the ubuntu partition for quick restore

I have recently set up my laptop for my ubuntu environment. Now that it's the way that I want it, I want to back it up so if something happens, I can wipe the hard drive, re-install Ubuntu from the original CD, then restore from backup to put everything back the way it is.

So here's the list of folders in my root directory of my hard drive.

bin    dev   initrd.img      lib32       media  proc  sbin     sys  var
boot   etc   initrd.img.old  lib64       mnt    root  selinux  tmp  vmlinuz
cdrom  home  lib             lost+found  opt    run   srv      usr  vmlinuz.old

I'm thinking the things I need to backup are:

bin
boot
etc
home
initrd.img
lib
lib32
lib64
opt--this is where I install my development tools like eclipse and tomcat
sbin
usr
vmlinuz

Anything else?