In another thread,a new shooter shared a near mishap (a ND or Negligent Discharge) while dry firing. I commend him (or her) for sharing this with the forum, as it reminds ALL OF US how important safety is.
Some posted suggesting putting thread through the barrel/chamber,and another recommends buying a "yellow plastic barrel" to replace the real barrel of your pistol, just for dry firing. I wonder what they recommend for revolvers...

I disagree. I think BOTH the above suggestions will "stall" and "retard" the building of real confidance. In other word's-they are "training wheels/crutches",IMO.
Why not be CONSTRUCTIVE?
Here is a video on some SAFE,CONSTRUCTIVE dry fire training. This is the RIGHT WAY. This method won't hold you back!The instructor even uses "snap-caps" to practice reloading. I recommend this video to anyone who wants to learn a proper way to dry fire practice.
http://www.youtube.com/watch?v=7mEoYHdpuLY" onclick="window.open(this.href);return false;