Yes, young grasshopper, you must have a financial mind like water...
To achieve stress-free productivity, you need to have a system you can trust 100%. If you have any unresolved items not in your system, you will never be able to trust it completely and always have some degree of worry, anxiety, or concern that you’re “missing something.” When you have a trusted system, you can achieve a “mind like water” in your personal productivity. You will respond in perfect proportion to the inputs in your life.
http://www.gettingfinancesdone.com/blog/archives/2007/04/applying-gtd-principles-to-your-personal-finances-part-1/