This is good advice, but I'd go a step further and write it down somewhere. These days, a lot of college kids have iPhones/iPod Touches (and if you do, there's a great free app called "Balance" by a guy named Conner Wokamo (something like that, at least -- his name stood to me because a.) I love his product and b.) what a weird last name) that you can use to balance your checkbook. (Although you have to add multiple account support via a $2.99 in-app add-in). Using something like this (or, if you like paper, a check register) to note your purchases in real time is a FANTASTIC way to make sure that you can pay the balance at the end of the month. I'm sure there are other similar products for other smartphones, PDAs, etc.
Also, just in my experience (and yours and others may vary), Chase is a horrible bank. I still use them to deposit checks locally, but I try to shift my "real" money to USAA (a much better bank--although deposits are still a pain if you're not a full member) or CapitalOne (who I have a credit card with, and like their rates on Money Market accounts; however, my parents think that they're evil).
/For what it's worth....