We've helped you "put together a portfolio":http://www.itsnicethat.com/articles/graduates-advice-portfolios; held your hand as you navigate the "agent or no agent" "debate":http://www.itsnicethat.com/articles/graduates-advice-agents and made you see "what you and your work are worth":http://www.itsnicethat.com/articles/graduates-advice-working-for-free. Now that you're free to think about all the fun things like invoicing, tax and paper stock, it's time to reflect. For the final article in…