The Indian web site for MBA applicants, PaGalGuy, has posted an excellent article, "How to make the most of an International MBA fair" on exactly that topic. Although the article is written from an MBA perspective, the advice goes for undergrads and other graduate specialities.
Before you wander aimlessly among the tables stacked with shiny new brochures for programs you know nothing about, read this article. Follow the advice in it so that you will make the most of the fairs you attend.
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