Today, my life is in shreds. Literally. And guess what — it feels great. Absolutely exhilarating, in fact. Here’s what happened…. I’m a resident of Westchester County, N.Y., which owns a giant paper shredding truck. All year long, the Mobile Shredder drives around, offering a secure way to recycle sensitive documents. At 10 a.m., that monster machine was parked in …