One of the most helpful tools I've found to track my spending is MINT. Mint is a free online service that allows you to link up your credit cards, banks, investments and input assets to determine your net worth. It is read only and in the last year I've used it, I've never had any issues.
I love that I can log into ONE account to see an update of my expenditures and I can categorize and analyze them. For example, yesterday I realized that we're on track to spend $1643 this year on beer (we have a kegerator). That's more than we'll spend on groceries, which is on track to be about $1100 for the year. I also can see how much I make from rebates and secret shops by categorizing the payment checks.
So if you don't already use a budget tracker, I would highly recommend MINT.COM. You can sign up by clicking the banner or the link. Its free too.