To wait for the return of Imam Mahdi means:
A) To get to know Imam Mahdi, as the innocent establisher of justice and the pioneer of faith.
B) To have faith in Imam Mahdi being the Imam and our divine and just leader.
C) To have love for justice and for human values.
D) To have hope in a bright future.
E) To try to establish the rule of justice.
F) To be committed to the rules of religion and morality.
G) To have the spirit of commitment and accepting responsibilities.
An important point to mention is that it is true that it is not our duty to try to meet Imam Mahdi, as some scholars believe that this is very unlikely to happen and even if it does, it happens to people like Moghaddas Ardabili only, and not to ordinary people, no matter how good and religious they are. But it is different to meet with Imam Mahdi than to be in contact with him. Our duty is to be in contact with Imam Mahdi and to say the Nodbeh Prayer, Ziarat Al Yasin Prayer, Ahd Prayer, Imam Mahdi’s prayer, and to go to Jamkaran in order to keep this contact with Imam and in order to pray for his material and spiritual problems to get solved.
source : tebyan