I might be completely late to this party but in the past week since signing up for mint.com - a free financial management tool, my ability to manage this part of my life has improved enormously. Log in and connect your accounts to Mint. Then let the magic happen. A quick check today shows a cheque for rent has just cleared, that Amex just slugged me a fee and an offer for a 0% credit card if I'd like to replace Amex.
The killer app though is its' ability to look at my financial statements, categorize each transaction and then analyze if I am better or worse than my budget. That process used to take me forever.
It really is very cool.