@ Ritchie4u, having a strong resume is your best bet. I worked in HR for some years, and I can tell you that tailoring your resume to match the job description is very important. Some orgs use a soft ware to filter resumes that don't fit the profile of the job, and if your resume lacks the keywords in the job description, then it will be thrown out, It will not even get the chance to be reviewed by a real human being.
Also, I will advise you to attend interviews, even if you don't want the job, it will help boost your confidence as well as sharpen your interview skills.
Try out these websites;
www.indeed.ca
www.workopolis.com
www.monster.ca
And its okay if you have multiple resumes, just be sharp enough to remember which one you sent to where. Lastly, never be afraid or intimidated by what you see in the job description, just break it down to your own understanding, you will be suprised to find out that its a job you can do.
Hope this helps....