Pay very, very close attention. I'm about to teach you a valuable lesson.
Acceptable things to put in overhead racks:
Purses which will shift around and spill all of their contents
The occasional guitar (only if accompanied with a smile while boarding)
Unacceptable things to put in overhead racks:
The flight attendant
Open drink/food containers (rude!)
The above lists are terrifically important for people who are flying home for Thanksgiving, because it's a short break. And to save yourself money and time, you should only bring one carry-on bag. Seriously, it doesn't matter how much stuff you have. Only having a carry-on means you don't have to pay for check bags, and even if they're free you don't have to wait at the baggage claim. If your flights get messed up, you can walk past a gate and board the closest, fastest flight home without worrying about your bags following you.
You really only need your carry-on and a personal item (read: two carry-ons in the form of a suitcase and duffel or backpack if you're a heavy packer. A carry-on and a purse if you're a woman). You'll be home for 6 days, tops. That's not a lot of clothes.
Last year, I fit all of my dirty laundry from about 5 weeks into one suitcase small enough for the overhead rack. You can too. That's all the affirmation you should need.
Just pray that, like one friend who took my advice, this isn't the one time someone stops you to go through your bag. You might consider a canvas laundry bag inside the suitcase just to keep incriminating clothing out of sight.
Happy Turkey Coma (whether you fall into it on your couch on in the school dorm cafeteria)!