What is your incoming voltage? How much current will you be drawing?
Given enough incoming voltage headroom, and low enough current draw, you could very easily use an LM317T regulator. It's far from perfect, but a handy one to have lying around (I have lots here) as they can be adjusted to create a wide range of output voltages with just 2 resistors and a couple of capacitors. They can even be wired up in a constant current arrangement, which is useful for driving LEDs.