Best way to migrate disks

[Marc Shapiro <marcnshap@gmail.com>]

I have an old 40GB disk and a recently purchased 1TB disk.  The new disk 
has been partitioned into a 2GB swap partition, two 500MB partitions 
that are currently empty and the remainder is an LVM2 PV which I have 
added to my VG, so I now have plenty of space.  So far, so good.

My problem is that I am still booting off of the 40GB disk and my / 
partition has pretty much run out of space (it is about 280MB).  I want 
to migrate everything from there into one of the 500MB partitions on the 
new drive and boot from there.  What is the best way to do this?  Any 
suggestions?

Marc