The topmost reason for not getting selected in scholarship in most of the universities as well as other institution or companies is due to the poor implementation of expression style as well as language.
I would like to share some simple steps to make your letter strong and considerable. I strongly recommend to follow it in succession.
Before hoping to the topic, you must gather specifics that will be needed for letter. The nature of scholarship qualification is depend upon the term and policy of respective institute/university. If you are required to write your letter on specific guideline then you are strongly recommended to follow it. For e.g. "letter size: A4, font: Times New Roman", double spacing paragraph. Otherwise, your letter will get instant rejection.
Your first impression is justified during the consideration period of your letter. It is an important part that you have to take care of. Your first impression strongly rely on your introduction. Your sentences must lure the attention of reader to whom must not get distracted. For e.g. "Introducing myself..".