Oh wow, I am a bit ashamed to admit my "dual use tool" to all ya'll!
But, it has to be my seam ripper. *Not just for unsewing those pesky D'oh! moments I have all too often* It also serves as a very quick stress reliever. For when I get most stressed, I not only rip the seam but have been known to rip a few crumbs to tiny pieces with it for good measure! ;-) Works for me! LoL