The maps navi is useful. I'm not the best at directions, and being able to IM with my people on the go is also, check my bank account etc. Using astrid to set my tasks, like paying the car bill and my taxes I owe, cuz I don't keep a physical planner as I was never into that shit, save some trees I guess and my credit score. Also good for an alarm clock, setting multiple alarms cuz I am the worst morning person.