Consistency is Important
Mentoring works because of the relationship between mentor and protégé. To develop maintain this relationship, it's important that the pair meet frequently and regularly.
Mentoring is a long term process, so in order to achieve best results, consistency is essential! Keep a schedule, and make sure that meetings occur regularly (once a week is often best). Be sure to communicate when you cannot make a meeting, and remain enthusiastic and professional throughout the mentoring process. Keeping your mentoring consistent will help ensure that you meet your goals, and that your mentoring relationship ends in success.