I've always job searched on the internet, but I've never found the big job sites (like Monster or CareerBuilder) to be any help at all. I've always applied online to the specific company's website, or found the job posted through a univeristy website and then emailed my resume and cover letter. I still consider this searching on the internet, though.
I know other people have supposedly had luck finding jobs with the big job sites, but I honestly think they're a total waste of time....so maybe if your cousin was only picturing you searching through Monster and sites like that, and just blindly sending your resume, he has more of a point.
But it's also true that different industries do it different ways.
"I don't know! I don't know why I did it, I don't know why I enjoyed it, and I don't know why I'll do it again!" -BART SIMPSON