[WizenedEE]

First, you have to figure out how it communicates with the microcontroller - usually i²c, analog, or SPI. If it's i²c, you'll need to find out its address. From there, google "arduino i2c accelerometer" (or whatever) and you'll have lots of information.

Or, if it's a pretty common sensor, you can just google the name of it with "arduino" tacked on to the front and get a good guide.