One thing I thought was awesome recently, had a business trip, Google Now knew about my flight information and popped up a notification telling me when to leave to be at the airport an hour early - even offered to navigate!
This is all a YMMV situation... I find that if I google something associated with a physical address on my desktop machine, logged into google, my phone will have a card with directions to that location.
That can be useful, but it's usually just an annoyance as I only wanted to call them or do something on their website.
Anybody have a solution to deactivate that behaviour?