That is, in fact, a facet of ACT. Do things to expose yourself to tiny amounts of fear an anxiety, then progressively increasing that exposure that until you either don't feel them or don't perceive them as bad.

Put another way; you become comfortable with being uncomfortable. Believe it or not, you can actually enjoy those feelings.

I remember watching an episode of MTV's True Life where they profiled people with OCD.

For 2 out of the 3 people profiled, the OCD stemmed from a fear of something bad happening and that was their way to cope. For one specifically, her mother had a surgery gone wrong and almost died.

The therapy was to have a mock funeral for her mother, go to the hospital and watch her mother have blood drawn and essentially go through all of the motions of having her mother die so that she could process it.

By the end of the treatment (which seemed to be a little ad for only a few weeks) her symptoms were drastically reduced.