Every time I approach PBooks it makes a little bit more sense than the time before. Getting the hang of double-entry accounting takes a little bit of time, but once you understand the why of it, it makes a lot of sense. As I understand it the double-entry records what you take from one account and add to another. So if you have a checking account with a $1000 in it, and a Credit card balance of $1500 (which is really -$1500) these are two different accounts. If you make a $100 payment on the Credit Card, your checking account becomes $900 and your Credit Card becomes -$1400. The double-entry accounting allows you to keep track of all your accounts and debts. It's a damn handy system, really let's you know where you are in regards to your financial standing.
The more I learn about accounting, the smarter it seems to keep meticulous track of all accounts debt and income.