Use professionalism and these strategies in your resume, cover letter and interviews when answering this tough question about past employment: "Why did you leave?"

Older candidates aren't the only ones who worry about how they're perceived by employers. Younger candidates for senior positions can take a few steps to raise their credibility.

Entrepreneurs have plenty to offer the senior ranks of corporations. If you're looking to change gears, be ready to explain your motives and your unique value.