This from the Institute of Management Consultants:
"A 2005 survey (still relevant) of independent consultants by Cadre Consultant Resources reveals that you are experiencing a common phenomenon. Independents work long hours for modest pay. One interesting finding is that nearly 40% of consultants are generalists with no specific niche or industry focus. About the same percentage of respondents found managing time and setting priorities was their biggest challenge to running a successful consulting practice. Take a look at the survey results to see where you fit into these results."
Survey Results: http://www.prweb.com/releases/2005/11/prweb308410.htm
The IAPSC acknowledges the Institute of Management Consultants USA for the use of material.