Best way to increase pain tolerance?

Is there a way to increase one's pain tolerance?

• I'm planning on getting a piercing soon but dont want to look like a baby complaining about how much it hurts. Is there a way to forget about the pain or increase my tolerance?

• Answer:

  I cracked a rib once. The pain that cased was REALLY bad! Even inhaling to breathe was painful, and giving a sneeze was so bad I had to sit down beforehand, otherwise I worried I might pass out. :( It sucked. And interestingly enough, after I completely healed from that injury, it seemed my overall pain tolerance (dental work, minor injuries, etc.) had risen. But I guess you don't have time to crack a rib and wait for it to heal.