Irv Jasinski, Capt. Bob Norris, and resumes
I second Irv Jasinski 100%. His book is an absolute must-read. I used his interview prep service to get ready for an interview, and I got the job.
Someone else who is good is
Captain Bob Norris in San Carlos, California. I used him to prep for an interview and I got that job. He knows all levels of aviation, and knows companies. Capt. Norris' book,
The Airline Career & Interview Manual is excellent.
Don't be afraid to toot your own horn a little on your resume. Put down a few good accomplishments, e.g., college, flight school or UPT graduation with honors and/or high class standing, high GPA, flight fellowships, Employee of the Month, prestigious CAP awards, etc.
To-the-point descriptions of your work are good, e.g., from my resume, "Trained Alitalia Airlines crews using the LOFT philosophy of flight instruction."
Hope that helps some more. Good luck with your job search.