What are some of the "dos and don'ts" of communicating with a potential job or internship employer?

What will be an ideal response?

DO: Thoroughly research a potential employer before applying, send an error-free application letter
and a flawless resume, and prepare for a job interview by reviewing your research and preparing
knowledgeable questions. DON'T: Send a form letter, ask about salary and benefits, and forget to
send a brief thank-you letter after each interview.