Etiquette and morals

What are the qualities of a successful da’i?

Is informing a mufti of a sin that one has committed considered a public exposure of one’s sin?  

The inquirer asks for the meaning of the hadith that states, “Removing harmful objects from the road is a charity.” Does this include everything that harms people?

An inquirer says, “I make it a point to visit my relatives and friends regularly, and I celebrate all occasions with them. We kindly request you to clarify the reward for this in Islamic law.”