This pdf is an excellent reference, that can help you identify the practice drills you can use to develop mastery of a specific sailboat racing skill. if someone says, you should work on your acceleration, you can go to this reference and find the practice technique to help you accelerate more efficiently. All these skills are important, and mastery of them is critical for success in sailboat racing. So get out on the water, practice these yourself, and turn your weaknesses to strengths!
Skills and Practice Techniques
This and many other excellent references can be found at sailzing.com.