How could we enhance public relation skills for personal effectiveness?

Do you mean to ask how your skills as a PR Professional will add to your personal growth? In that case since PR is all about effective communication, I think this is one of the main areas you can see yourself improving over time, not just at work, but also at home with friends and families.
It will help polish your extrovert nature, enhance your creative skills and you will always know how to put your point across. 

well it is all about you comunication skills and your beleive in the product you sell, first of all you need to have a long experience dealing with people in different fields to figure how to communicate with each one, each group, then you have to determine your needs from people you deal with and how to get the penefits from your relations in how to provide the maximum usefulness for your company, and you effectivness will be in the top level if it is conjunct with the full beleive in your product   

HI - Public Relation skills can de defined in terms of, good communication skills, Management and team work skills, ability to judge someone quickly, applying common sense, Time management, creativity can be part of it.
This all contributes in personal growth too, you can recall the first day when you joined in to this profession, analyse what you were and what you are.....