Has this happened to you? You apply for a job believing you meet all the requirements. Then you wait and wait for that call to schedule an interview. But it never comes.

Why weren’t you picked? Here are 10 possible reasons:

1. You didn’t give enough information. For most people, a one-page resume is not enough. Two or even three pages may be what is needed to properly explain your background.

2. You didn’t follow instructions. In ads, I often ask candidates to write a cover letter explaining how their background and experience meets our client’s needs. Many do not send a cover letter. Others simply regurgitate their education and skills but few link these to our client’s needs. That tells me they don’t follow instructions or are too lazy to research what our client’s needs are.

3. You have unexplained gaps in your employment history. These may be for legitimate reasons like maternity or education leaves. But don’t expect the employer to play detective and figure this out. Be sure to insert the reasons for the gap.

4. You have spelling or grammatical errors. This leads employers to conclude you lack attention to detail. Before sending, ask a friend or colleague to edit your material. Or try editing from a printed copy which is often easier than editing on a computer screen.

5. You have a dubious online presence. Employers are checking social media sites to gain more insight in to what you’re like as a person. Clean it up.

6. You follow up incessantly by email or telephone. Your eagerness may come across as annoying and the hiring manager might conclude this is how you will behave on the job. Be patient and have reasonable expectations about when the employer will get back to you.

7. Your resume is poorly designed. Pay attention to layout, typeface, font, line spacing, and margins. Make your resume easy on the eye.

8. Your relevant experience is buried in your resume and hard to find. Employers will stop reading after three or four bullets. Make sure your most relevant experience is at the top. And eliminate statements that start with “Responsible for …”Hiring managers are more interested in your accomplishments and how you have added value to past employers.

9. You appear to be (or are) a job hopper.Employers take a cautious approach when someone has changed jobs often. If any of these job changes were for valid reasons such as merger, sale of the business, or large scale layoffs, or were simply contract positions, be sure to state these reasons.

10. You didn’t use key words and got screened out by an automated system. By the way, the same problem occurs if an inexperienced human is doing the initial review of resumes. They may not understand the role well and overlook qualified candidates. Take care to use actual (or similar) language to what is being used in the posting.