James Barth

I agree different Cover Letter styles based on company culture and position you are seeking can be effective. 

Know your audience when writing your resume. A small company may have a manger who has many responsibilities and less time to read resumes than an HR professional in a larger organization. Keep your resume concise and easy to understand on a quick read. Bullet point information relative to the position. 

It reassures my student resume advice. For the most part I have been using these techniques when advising students and the example I give them to follow.