[ALUG] Transferring Linux to another hard drive

Hi guys, I'm looking to transfer one of my linux boxes from it's 3Gb drive to a bigger drive (40Gb). What's the easiest method to transfer a partition including the boot manager to another drive? How can the root parition be resize afterwards? Or would it make sense to start using a separate /var, /usr partitions? Mounted devices are /dev/hda1 on / type ext3 (rw,errors=remount-ro) proc on /proc type proc (rw) devpts on /dev/pts type devpts (rw,gid=5,mode=620) tmpfs on /dev/shm type tmpfs (rw) usbfs on /proc/bus/usb type usbfs (rw) Cheers David