My Condensed slap in the face...

Okay so I was sitting in my Book of Mormon class today. Bro. Christensen is my teacher and he is awesome!. Anyways today he was talking about the gift of discernment today and how powerful it is, and I was like "woah" because I have that gift too. I don't think I ever fully understood what it meant though. I'm sure a lot of people have it, but I want to use it as much as I can in my life. I want to help people, I just don't know how... Any suggestions?