One of the biggest oversights that people make when they are writing a cover letter is to make it all about themselves, but one of the best ways you can make your job application stand out from the crowd is by really researching the business you are applying with, and peppering your cover letter with information that only a person who is familiar with the company would know.
Visit the company website, and Google the latest company news. In particular, a good place to start is by looking up the careers page on the website of your potential employer and learning what sets them apart as an employer brand. Familiarise yourself with what the company does and how it talks about itself so that you will be able to mention this in your cover letter, and also during your interview.
E.g.. "I have always admired ABC company and so when I saw your job advertisement I jumped at the chance to apply. Having read an article just the other day about how ABC company is expanding its operations into our western region, I can see how robust your business strategy is, and would love to be a part of this exciting new growth period in your organisation"