Attending a career fair can be a draining experience -- always having to be "on" for the recruiters, repeating your elevator speech over and over again.

So, as needed, take breaks. Sit somewhere off to the side and kind of get recentered and refocused on your goals and your plan. If you need to, get a snack or go to the bathroom and sprinkle cold water in your face -- whatever it takes to regain the positive energy you need to face the remaining recruiters.

Taking breaks will add to your time commitment to the fair, but if you're job-seeking, most of your time should be centered on job-search activities.