If you haven't heard it yet, go to dropbox.com
Makes commisions and other freelance work so easy to work with. For myself and render images it is a simple transfer and yourself or client can get it in a heartbeat.
It's also nice for having you digital art readily available anywhere you go with an internet connection. The mobile app for it is great too.
With a seperate folder for my professional work I can just bring it up any time on my phone when I go to conventions and such. Which (for me anyways) is a much better alternative to printing and making a binder for every fair or convention I go to.
Anyways deffinately a must have in my opinion so go check it out.
If you sign up with db.tt/vJn3kTCl
(dropbox referal system, read up on it. Good deal for everyone
We both get an additional 500mb free storage for free. Would be awesome if you do, if you don't, go to www.dropbox.com
(dropbox's main site) anyways and check it out for yourself anyways.