There are now over 100 million people on LinkedIn, people you can do business with, people you can impress with your profile and your knowledge. Most business people have a profile on Linked In and I'm sure you do. However, is your Linked In profile as professional, effective and engaging as it could be? I've noticed more and more business people failing to update their Linked In profile effectively; leaving it incomplete and not making use of the many benefits within Linked In. Here's our recommendations for 'what to do' and 'what not to do' on LinkedIn.