Looks like you're running a Limited from your picture.
Step by step:
1) Turn the car on.
2) Set the computer to display Trip A by pushing the odometer button.
3) Turn the car off.
4) While holding down the odometer button, push the 'push to start' button twice.
5) Keep holding the odometer button, and you'll see 5 bars on the trip computer, counting down until 0 bars. At the end of that sequence, it should flash 0000000, at which point you can release the odometer button, and the maintenance required light will turn off.