Whenever I'm seeing well maintained BMW, MERC or AUDI. I ask a question to myself.. "How they are maintaining such a expensive beauty from City traffic?"
I do that "most of the times". If you spot an arrogant or rash driver, simply let him go or pass. Same applied for women drivers (some women are great drivers though). Whenever a biker or autorickshaw comes close, I simply slow down and let him pass. When standing in a signal, either stop the car so close to the median/divider that no biker can pass from there or keep so much of space that a biker can easily pass. I normally avoid parking my car near a car which has a lot of dents/scratches or has the 'L' board. I drive slowly so that if someone cuts across, I dont have to brake hard, which prevents a rear end. Brake as gently as possible even if that means you need to stop just 2 inches away from the car in front. Drive fast in the right lane or slow in the leftmost lane. I avoid the middle lane unless i am giving way to someone who is faster than me. I avoid the middle lane because this lane is used by both - very slow drivers and very fast drivers!
In short, give way to one and all (especially pedestrians) and safeguard your car from other morons on the road.