Just having a LinkedIn profile won't work. You actually have to use the thing! Connect with old and current co-workers and congratulate them on their new gigs

Just having a LinkedIn profile won't work. You actually have to use the thing! Connect with old and current co-workers and congratulate them on their new gigs, follow interesting companies, join LinkedIn and other online groups, write articles about your expertise so people will notice you, contribute to open-source projects, and build a killer portfolio. Those are some of the things I try to do, which seem to work - and I don't even have a proper high-school diploma (barely passed my GED).