I often give presentations to job hunters in Denmark, and I tell them there are two words you can add to your cover letter that will virtually guarantee that it will be carefully read.

What are those two words?

The name of someone you know who already works at the company.

Of course, you should only use a current employee's name with his or her permission, and ask each time you use it. There's always the chance that your contact and this particular hiring manager may be bitter enemies, or that a company is so vast (say, Novo Nordisk) that a recommendation from a scientist won't have much impact on the hiring of an accountant.