Make macbook store apps on one hard drive and data on another
Copy your home directory over to the other drive.
Open up System Preferences then the Users &amp; Groups pane.
Click the padlock to unlock it
Right-click on your name
Change the Home Directory to point to your newly copied one on the other drive.


NB. You might want to use a syncing program to do the copy, or create a different user to do the copy as after rebooting so that your original user isn't logged in and running anything. Makes the copy cleaner.

If you want to do this with a brand-new user, so much the better.

Alternatively, you can use your existing home directory and just sym-link everything over...

Select the folders in Finder on the new drive - ctrl-L (File menu -> Create Alias), then drag the aliases to the old drive and remove the old originals. This is less neat, but works just fine.