I always found job boards to be entirely useless. Hundreds, if not thousands of resumes sent, each of them individually tailored to meet the demands of the job, with absolutely zero response. I would not bother with this and try to do the networking bit as much as possible
I disagree. My current employer, now of five years, found me on Workopolis. I wasn't even in the same industry. My profile simply said I had marketing and sales expertise in the food/agricultural sector, and now I work for a Fortune 200 firm in a marketing role I absolutely love, with opportunities to travel and one-day relocate globally, defined benefit pension, low MER TSFA with employer contribution, good benefits, and for the private sector good job security. I get to build products and then see them on sale on Canadian retailer shelves.
My very first job out of school (Poly Sci BA (Hons), plus one year Int'l Trade diploma from GBC) was found in the Toronto Star classified ads in 1996. I stayed there for four years as their export sales and marketing manager, travelling around the world selling food products. It was a great job, and fantastic stepping stone to new and good opportunities and positions.
My next job was found on Workopolis, where a recruiter found me and got me an offer in Fredericton, NB as a export sales guy in the food biz. I had the fortune of travelling to Europe, Israel, China, throughout New England and east coast USA to sell and market their products.
So, I'd say never disregard the job boards. If you're not getting call backs, maybe it's not them (i.e. employers), but you that needs to work on your profile and offering.