The scholarship sponsor wants to see evidence that you satisfy their criteria, not just unsupported statements. Read all the scholarship requirements and directions carefully, and make sure that you are eligible before you send in your application. Your application will not be considered if you aren't qualified to apply. Try to understand the sponsor's motivation in offering the award. If you can identify their goals, you can direct your application toward satisfying those goals, increasing your chances of winning the award.
Many students fail to follow directions.
You can give yourself a competitive advantage by reading the directions carefully. Provide everything that is required. But don't supply things that aren't requested. You won't impress and you might be disqualified. Be sure to complete the entire application.