To get a job is very easy once you follow some guidelines, i noticed most applicant or job seeker fail while applying for a job.
To write an application letter or fill online, you need to be very careful, the information you givemust be correct, avoid grammatical errors and use correct spellings
Some of the mistakes that may forfeit your application are listed below:
* follow instructions you mustfollow the instructions and guidelines given to you by the employer
*some people are so lazy to the extent of writing see attached to avoid filling of materials because the information requested for is duplicated on attached CV.
* Create a email with good adress , infact you can use your name and surname and notemail like manloveth@gmail.Com
Grammatical errors Before you submit your application make sure you cross check again and again, you can even give to friends to help you cross check
* Incorrect information Somepeople write incorrect information in their CV so that they will be employed, doing this is not good and at your own risk
* Experience/Skills highlight skills in accordance to your target job.
Some people submit their application to the wrong person,make sure you submit your CV to the department or person highlighted in the Advert
Above it all, PRAY prayer is the master key

source: http://livebetalife.com/simple-mistakes-that-may-forfeit-your-job-application/