I have a Professional Profile, but I call it My Business Resume. I approached it like a Personal Resume, but I used the years I have been in business and who I have work for along with the tools of the trade. I also include what my primary niche is and also my secondary. Be creative but be truthful.
In approaching this, think like a business owner one who is looking for a client like yourself. You know how it felt when you went on an interview. You know what a client is looking for now put in on paper in the format of a "Professional" or a "Business" profile.
Oh one important thing, I don't know if everyone in the forum will agreement, always include your education in your profile and if you were an employee at one time show that also. I hope this helps.