When going for a Job interview make sure you have a good resume written out and if you need a good resume written out you should hire someone to help you write a good resume.
Also dress properly and look your best and be prepared to ask some questions in the Job interview.
Show the Job Interviewer your experiences and tell the Job Interviewer that you would be great for the Job and let them know exactly why you're good fit for the Job.
If you don't get a call back for an interview for the Job then call back yourself to check in about the Job as it shows you're interested in the Job and will make it more likely that they will hire you.
It's no guarantee that they will hire you just because you call back but it does help and shows you're really interested in it.