Increase the spacing between paragraphs and bullet points. Basically put, you will want to make sure your page is not filled from top to bottom with text. Make sure that there is white space on your letter. It just makes it easier to scan or read. Limit your paragraphs. This may seem difficult to fit in all of your information, but you will want to keep the maximum amount of paragraphs to 3. Similar to when you read an article on a website, the longer and more paragraphs the content has, makes it seem like a difficult read.
Once the letter is written, add a line space and use either "Yours faithfully," or "Yours sincerely," before your signature. There are several schools of thoughts as to when it's appropriate to use "faithfully," or "sincerely,".Follow this rule:"Yours faithfully," should be used when the name of the recipient is not known (so, in a letter with an introduction of "Dear Sir/Madam:").