A great article for tips on interviewing for temporary positions. This article focuses on older workers, but I feel these tips can be applied to almost anyone looking for temporary work, regardless of age or career status.
Yes, you still need to sell your brand and present yourself in the best possible light. However, what a company is seeking from a temporary worker is different than a permanent employee and they have separate criteria that you need to address in an interview. Generally, contract work is more transactional in nature, and the employer is looking for a person to fill a specific role or work on a project. So your ability to show that you can fill that role can be the difference between winning the job or continuing in your search for work.