Recently we spent some time covering the dangers of backclipping. Occasionally, when things don't seem to be going your way on a sport climb, you might want a little extra security aside from just clipping the draw correctly.
For extra security, one of the most obvious moves is to use a locking carabiner on your draw. This will ensure that you don't come unclipped.
Another extremely quick and easy tactic is to clip your draw in backwards (i.e. the tight end of the draw goes to the bolt) and then clip your rope through the loose end. Once clipped, you can flip the rope carabiner over, thus making it nearly impossible to unclip.
Here's an example:
Note that the rope is still running over the spine.
I don't think one needs to do this on every bolt. It doesn't provide that much additional security, but it provides enough that you might think about doing it before launching out onto a blank face with no idea where your next bolt is...
--Jason D. Martin