When identifying possible references, focus on those people who you are certain will have positive things to say about you. Try to include past employers, regardless of your length of employment with them or the type of work you did. Consider former supervisors of school-related projects, volunteer work or internships. If you are a recent graduate, your former professors, department chairs, academic advisors or coaches may be ideal references.

Once you’ve provided your references to a company, be sure to let the references know to expect a call. Provide each reference with the name of the firm and the individual with whom you interviewed and a brief description of the position. Also send them a copy of your resume, as many employers refer to this document when making reference calls.

On a final note, when you have accepted a position with an employer, be sure to send a thank you note to your references and periodically update them on your progress. If you keep in touch with former supervisors as you advance in your career, you’ll have a ready list of valuable contacts who in the future can attest to your skills and professionalism.