The first decision to make while writing your LOR is deciding who will serve as your recommenders. They need to be able to write a persuasive recommendation letter for the admissions committee and be someone aware of your qualities and talents. They must be aware of the job you have completed, your position and duties, your accomplishments, and even your faults. Selecting a recommender who does not have any experience working with you might be catastrophic for your LOR since they could not have anything insightful to say about you.