As most of u will agree is temporary urine incontinence a matter of just relaxing yourself and letting go, this is a lot harder for bowel incontinence .
Now personally i got great results with the anal stretching ring van Huse, (http://huse.com/scstore/p-218123_anal_stretching_rings.htm).
It takes a bit of practice inserting one, but ones in place it works great. Basicly its a butplug with a hole in it, when installed u will start pooping all over yourself very quickly, u really need to have a diaper ready or it will be to late already, its gets really messy, and there is nothing u can do about it.