10. Use poor spelling or poor grammar _ This one should be pretty obvious. Academics on admissions committees are generally high achievers with high standards who won't disregard even simple typos. If your personal statement is not technically perfect, it can make you seem sloppy, lazy, or inattentive, which are not qualities anyone wants in a future colleague. Remember that the people skimming your essay are seeking a reason to reject your application and make the pile of possible admits smaller. Always get someone with strong writing skills to review your essay.
Telling Them You Want the Job _ The hiring manager already knows that you want the job, otherwise you wouldn't have applied yet applicants insist on telling the prospective employer how much they enjoy their line of work and their desire to work for the company. Your personal statement should focus on the reasons WHY you should be hired, NOT why you want the job.