I am an independent contractor that works with investment management companies to help them achieve GIPS compliance (Google it - http://www.gipstandards.org). Therefore, I work for myself, and deal with Rates of Return, Processes and Figures. I'm not an accountant, but if you've ever gotten a statement for your investment, and it shows a Rate of Return, that is what I do.
So, mainly what I do is focus on Process for the clients, for if their processes are correct, the numbers will turn out right.
Some people have come up with puzzles to be incorporated, because when you read the text of my current website, if all of the piece fit together correctly, then the numbers will come out correctly. Therefore, if the Process is correct, everything else will work. Therefore, Process is key. Something that says "Process" or "Pieces fitting together"