Dawah is one of the obligations that we, as Muslims, have to fulfil as Allah (SWT) Himself encouraged his mankind to do so.
Also, our beloved Prophet Mohammed (PBUH) has been the biggest example of individuals who have tried time and again for many years to bring people come closer to Islam. However, it is not always an easy task to practice Dawah. In order to practice successful Dawah you need to do the following:
Tip # 1: Make Your Intention Sincere
Before deciding to practice Dawah, he has to make sincere Niyah. Niyah is the intention of doing something and without a sincere Niyah, the practice of Dawah can be very difficult. Making sure that you ask Allah (SWT) for his help in carrying out a task is a responsibility for every Muslim.
Tip # 2: Practice What You Preach
A lot of the time Dawah doesn't make the kind of impact it should. One of the reasons behind this is that the person practicing Dawah doesn't practice what he preaches. You must ensure that he performs Salah, give Qurbani, pay Zakat, and perform Hajj etc. in order to justify his position in his Dawah activity.
Tip # 3: Use the Quran & Seerah as Dawah Guides
Using the Quran & Seerah as Dawah guides (biography of the Prophet Mohammed PBUH) should be everyone's priority. Dawah would be more affective if the examples provided, covered the life occurrences of Prophet Mohammed (PBUH) and the teachings given in Quran. When the examples are backed up by references, nobody will be able to deny the facts and figures, resulting in many more people coming closer to Islam.
Ameen.