It is like a signal.Transmitted from heart to heart.From my observation,almost 70% people talking or delivering tazkirah ONLY based on their knowledge.Thus, we can see their behavior and daily activities didn't reflect the way they said.Even,their tazkirah didn't touched and stick firmly in our heart.
I've met people who can deliver tazkirah in simple,without bombastic words and terms plus it influenced the audience very much.
The key point is,whenever you wanted to deliver tazkirah,make sure you implement what you were saying and the most important thing, you need to be IKHLAS.A good preacher,will not only good in preaching, but in implementing what he said.Allah said in the Holy Quran:
"O ye who believe! why say ye that which ye do not?(2) Grievously odious is it In the sight of Allah that ye say that which ye do not.(3)"
Note : Let us tarbiyyah our heart from dotted sins.
Note2:I preferred da'wah bil hal as less words being used.+ I'm still lacking in skills of delivering tazkirah.