JobBank is useless for actual job hunting.
My recommendations to you to facilitate a job search:
a) Indeed.ca is one of the most useful websites to find jobs within your field, in the area where you live
b) LinkedIn (make sure your profile and resume are updated to Canadian standards)
c) Workopolis has a rather extensive list of job postings, especially for some fields and industries
d) Monster Canada is a bit useless, but there are relevant and useful postings on there every now and then, and it can't hurt to make a profile
e) Local job boards and listings in newspapers
f) Networking with Canadians, so that you are made aware of several jobs that may never be advertised
g) Walk ins, especially for lower leveled, and survival, jobs
h) Local seminars for immigrants, which can help them find jobs
It's going to take a concerted, well organized effort to try and find a job in Canada, especially depending on your field, your credentials, and your country of origin. Make sure to take all the points listed above into account. Good luck.