How to approach Sunrise & Sunset shots

[gjk]

Any suggestions on how to approach sunrise and sunset photos is much appreciated.
What areas should I focus upon if my goal is to bring out the warm and vibrant colors of the sky? What would a polarizer do for me in such a situation?

Thank you

Camera Model: NIKON D90
Exposure Time: 1/199 sec.
ISO Speed Rating: 200
Flash Fired: Flash did not fire, auto mode.
Metering Mode: Pattern
Focal Length: 42.0 mm
Lens: 18-105mm f3.5 - 5.6

[barabe]

The main thing is timing and being there as it happpens. A few seconds makes a whole lot of difference in the lighting and color. I like my sunrise and set when there are a few clouds to reflect some of the glow from dhe sun colors.
I dont think a polarizing would help but if you really want the warm colors, sunset filters do exist with a graduated orange tone.