Mint.com is my best friend.
It's like Quicken, for the Internet, but more helpful. You input all your credit card, student loan, investment, savings/checking account info, and it spits back updated info about what is going on with that account. In addition, it will see all your Dunkin Donuts transactions, whether you pay with debit card numero uno or with a credit card. So you can track spending across categories.
This was an eye opener. I saw where I was hemorrhaging money, regardless of the account I used to pay for these purchases. Mint also deduced my net worth (*sob!*) and could track my income/spending/lots-of-stuff over many different filters and search settings. Maybe I wanted to compare May income to July income. Or see how one bank account was doing this week compared with last. Or how much I was spending on gasoline in April compared with August.
In addition to these invaluable tools, Mint allowed me to set up financial goals, and track my progress and see how I was sticking to a budget.
In other words, Mint.com is the bomb, yo. I love it. It is incredibly invaluable. Hopefully it won't get hacked into and make me a victim of identify theft, but I digress.