A few times in my career I've responded to job listings and contacted recruiters but these days I do no sales/marketing. The vast majority of jobs I've gotten, even the first few, have been through contacts I made online in the BBS days. I was also lucky that my first few real jobs were long-term freelance contracts (1-2 years each) so I didn't have to look for work very often. The landscape has changed tremendously since then, though, and these days a resume is less important than a good portfolio.

My advice: join a small, local tech oriented community, contribute regularly, and don't discount the value of F2F. Happy to go into more detail here, or contact me at kmoser.com.