Webster's Definition: An obligation or willingness to accept responsibility or to account for one's actions.
Generally speaking, you get a bill for these items. You have a couple day grace period, but if you screw up, someone takes something away from you. Thus, you figure it out one way or another each and every month. This is basic survival in real estate... you hopefully figure out how to cover your required, externally accountable bills.
In the Real Estate Treasure Map, this is covered with 'My Financial Picture' section. You must know this number, the 'nut' you must crack every month. So, what about 'Internal Accountability'? Tune in today and learn what it is, and why it's so crucial!