During the summer months (and really anytime) people are looking for jobs. It seems hard to find IT related jobs though. One of the ways to look for a job is to pick a specific company to work for and see if they have any positions open. Another is to get contacts to get a positions and use your social network to land a good position.
But sometimes you just don't have any idea what you're looking for or what to look for. Good resources for this are the various job searching websites that are available. They might not necessarily find you the job you want but if anything it will get you an idea of what you should be looking for.
The following are a few good job sites that I have found or have been suggested to be as being good to get you started on your job hunt:
Job Bank Government
City of Toronto Job Board