Witnessing - More Verses, Who and How

I keep finding more verses about witnessing lately, and although it is not my goal to post all verses on a subject, I do want to post enough for some good direction.

Witnessing - verses of wisdom

2Ti 2:16 But shun profane and vain babblings: for they will increase unto more wickedness.

Witnessing - How should we witness?

Just as there are different people and different styles of learning, there are also different styles for teaching. However, the Bible does lay out a few pointers to help us speak about the Word.

Jas 5:19 Brethren, if any of you do err from the truth, and one convert him;
Jas 5:20 Let him know, that he which converteth the sinner from the error of his way shall save a soul from death, and shall hide a multitude of sins.