I swap the 1% of cash that I do have in a safe, turn off my cell phone and leave it at home powered off but not destroy it, pack and fire up the dual sport motorcycle with license plates, and go camping in the mountains. Not sure if I'd take a piece or leave it....it depends if I think I'm being pursued by that assassin from No Country For Old Men (a shotgun and a flamethrower) or just a disgruntled husband (small caliber Bond-like gun).
Bourne always seem to cross borders with ease in the movies, but I know I don't have the chops to pull that off so I would just stay as rural as I could and try not to attract undue attention. Maybe in area of the country that distrusts well-dressed corporate henchmen/government officials with aviator sunglasses....maybe somewhere like Idaho. Idaho English is one foreign language that's pretty easy to learn and I can fake it a slight accent already.
Also, the bad guys have a hard time navigating those black suburbans with tinted windows on forest service roads and even harder time pursuing a motorcycle.
Or, maybe I'd stage a SCUBA accident where the body can't be found......in a deep, cold lake in the same part of the world.