Something you don't leave the house without
My Blackberry....I never leave home without him for more than one reason,
probably because I'm addicted to him! but on some real stuff once i got my first cell phone my father said take it everywhere because you don't know an emergency will happen...so I take my father's advice and I don't leave the house without it.
Also my BB does everything from calculating a tip at dinner to finding me and showing me the right way home. I have left my purse behind before i have left my phone...sad situation.