I'm going to cover some very basic stuff here if you are in a job search, or planning one soon, as a person with global moxie.
First, draft a good cover letter. They're important. I am always surprised by young professionals or soon-to-be graduates who have not written a good cover letter, or been advised to do so. Why are cover letters important? First, they show your written communication skills. They show that you can think coherently, and that you understand your own narrative about your experiences and your career goals, and how the specific application you are submitting aligns with your goals and experience. Think of a cover letter as a friendly way to have a professional introduction that you get to initiate - you're basically holding the attention of the hiring manager for a few minutes. Just you! You alone! Talking to a person who might want to hire you. Don't waste this opportunity.
Start with an introduction, reference the position, and then give a first paragraph about your skills and experience. In your second paragraph, explain how your skills and experience can address specific requirements of the job. Then make a nice conclusion. Be friendly, but not pushy. Say you hope to speak with the hiring manager further about your application.
And for Pete's sake, do it well. A bad cover letter is the kiss of death. Check for grammar, typos, word choice. Keep it professional. Don't sound crazy, and don't use nutty fonts.