One of my best friends (used to work for me) just left Coke. He was a VP. My son graduated two years ago from college and went to work for Coke right out of school in sales. Loves Coke. Was promoted last May to operations. I spent 30 years in the beverage industry and the last 7 of my career as a VP in the food industry. Here is my advice and some of what my pal told my son:
Prepare for the interviews. Thoroughly. Go to retail stores and talk to the grocery manager (HEB, Wal-Mart, etc). Make a list of questions. Tell them you are interviewing with Coke sales. Ask what they do well, what needs to improve, what could you do that clearly exceeds their expectations if you were calling on them. Get their name and store number or address. Make notes. Read everything about your companies you interview with. Have questions for the folks you interview with. Prepare a short presentation on your store visits. Tell them the good and bad you heard. Tell them how you can help.
Lastly, at the end of the interviews, ask each person this:
If I were hired into this job, and at the end of the first year I had clearly exceeded your expectations, what is it I would have accomplished?
This tells them you plan to far exceed their expectations and tells you what that takes in each persons eyes. Take notes and when you write your follow up letters/ emails, repeat those thing briefly to them.
If I can help you in any way, let me know. I have hired many people at all levels and even done some executive placement since I retired. I' m cheap: free.