I started two years ago by joining a local acting group, met a few people there. I've advertised in the local Kijiji (an online want ad site) for people interested in various aspects of filmmaking. A lot of people have come and gone; many people _think_ they want to make films, but in reality they aren't prepared to put in the effort required. Over time though, the group has grown and there are 3 or 4 of us that are very dedicated, and a few more who enjoy the production part more than the pre and post. From them, we seem to finally be able to get a decent crew together.
It's taken a long time, lots of work, constantly looking, talking to people, asking people, etc. But it all started with a Kijiji ad and joining a acting workshop.
CraigL