Over the years I have worked for four employers (Including my current one). Out of these four jobs three were gained through contacts rather than formal application.
before I started doing stuff with computers I had to call people and set up appointments for jobs.
(these were all art-related: props for plays/commercials. costumes for same, etc etc)
anyway, even tho i hate talking on the phone (you have NO idea!), i'd find a list of places and call one by one. whenever anyone said 'send a resume' (which is "job-speak" for 'we have no openings now'), i said, I don't send resumes. I go in and see people.
seriously, i was very firm.
if they couldn't see me it was because they really had no jobs and if they could see me, then my BEING there is what 90% of the time was what got me the job.
and it's not because i'm charming because, believe me - I HAVE NO charm. But i was determined and forceful and this is what convinced them. It can't hurt to be JUST slightly intimidating. it also helps if ya know what you are talking about and seem competant.
Of course, this was all in NY. Where a forceful personality is considered ok.
when I worked in LA - arg! they are such pussies over there, it's impossible for me to use my normal techniques. and I really have no others. working there is all a matter of luck.