I'm out of space on my Macbook Air and thinking about ways of removing things. One idea is to put all my music (~100GB) on a big thumb drive (y, and back it up). I pretty much always have my keychain ...
I have two drives in my machine: An SSD with the OS on it a HDD with all my data. I have a symlink on the SSD for my home directory on the HDD so /Volumes/SSD/Users/Ross/ points to ...