The article reports on the survey conducted by ClearRock, an outplacement and executive coaching firm, regarding popular retention methods of companies in Boston, Massachusetts. Research shows that employers experienced difficulty in keeping both their frontline and high-potential employees who are considered crucial to a company's success. Operations and production workers are the most difficult frontline employees to retain, followed by information services and computer-related workers, sales and marketing employees and customer service employees. To address the issue, employers are using retention programs including careful selection, better compensation and benefits, better orientation and assimilation programs, coaching and improved training.