Marketing onlineOnline marketing advices

I went to a career fair at my alma mater this morning and I must say it was quite discouraging. I have a degree in advertising and marketing and it seemed that most of the jobs there were “store management trainee” and entry-level retail management type jobs. There were also a lot of insurance companies. Also it seemed like most of the companies were STILL sending people online. (which history shows doesn’t work for me). I am a little disheartened becasue I am looking for more of a corporate-office type marketing position at an agency or corporate office. My question is…are job fairs really just a waste of time, has anyone been successful?