My opinion: people who generally like people / interacting with people tend to do this anyway although with less of a structure. People who generally dislike socializing or dislike people in general will find this seriously difficult.

So far (37) I got away with simply applying for advertised jobs. However I write a professional blog, which has not much readership but has quite an effect when I link it in my application e-mail, and I make it a habit to save anonymized PDFs about my most impressive works which again sets my application away from others who just send a CV / resume.

These two - professional blogs and a references folder - are IMHO the the best two impersonal ways to make a job application stand out and give a high chance of win. However it is still just advertised jobs and I am starting to think they somehow have a common tendency of sucking :) The good ones go in the network so networking is still preferable, just simply painful for the asocial types.