Checking your weather.
Driving routes or directions.
Finding a local store.
Listen to music loaded to the device or streaming.
Making notes and reminders for followup to clients.
Checking the latest news.
I could go on, but I probably do TOO much on mine.
5 email accounts
Text with family and friends
Obviously use the phone
I.C.E. (In Case of Emergency)
Gas Buddy for prices
I use it for:
pay for my Starbucks purchases
photos and videos,camera
listening to music including Slacker, BBM music and music from my media card
Google maps for directions and calculating travel time and mileage (have to document this for work)
listening to radio with iHeart Radio and TuneIn Radio
tracking stocks and markets with Bloomberg
Check my minutes and data usage with MyVerizon
phone (only very rarely)
Music with BBM Music and Media Music (Wi-Fi sync with iTunes)
news and weather
navigation and directions, finding closest store (or Tim Hortons)
aviation weather and other required data (NOTAMS)
logging flight time, weight and balance calculations, getting airport data
travel planning (BlackBerry Travel and the Air Canada app)
reading books (only if no other option)
social networking (twitter, facebook)
Bridging with my PlayBook
My other Blackberry is a PlayBook.