I used Gary Goldmann at Van Der Kooi, and it was the best thing I could have done at the time. It helped increase profitability showing me how to bid properly. Once this is in conrol it is easier to make forecasts and then manage accordingly.
Having someone who knows whats up look over your operation is really important too. That person can spot weaknesses you wouldn't know to look for, and they can give you reassurance on your strong points. Lawnsite is a great place to get advice, but it can't compare to a consultant.