What is the best method for students to get a summer internship? What kind of things does hiring want to see from a student? What format of resumes are the most

What is the best method for students to get a summer internship? What kind of things does hiring want to see from a student? What format of resumes are the most appealing? How do you negotiate costs and ensure the student can actually afford to live that work? I've asked a number of people, including uni admins, and none of them are based on words from the people whom actually hire. Especially in software where resumes and hiring are worlds apart from accounting.