salam
1) First of all a da’ee should be firm in his belief that Islam is true religion. Quran 3:19
2) Should have good manner
3) A da’ee should have a good grasp of the knowledge to which he is inviting.Q 12:108
4) A da’ee must join an organization to impart da’wah.Q 3:103-4
5) A da’ee must strive for self-purification.Q 8:1
6) A da’ee must do proper prior planning
7) A da’ee should develop good speaking, writing, and computer skill.

A da’ee should develop in himself the quality of patience.Q 16:127
9) Toleration and forgiveness. Q 16:126
10) Taqwa. Q 3:102
11) Justice.Q 4:135
12) Soft spoken. Q 20:44
13) Moderation in behavior and attitude
14) Dynamic and zealous in da’wah. Q 18:6
อย่างสรุป จาก Significance and Characteristics of Da’wah ILLALAH,prof syed hasanuddin Ahmad