Another very easy one. Select a track (Let's Go Away is the one everyone knows, and is on the title screen) and start the 'race' (it's more like a free run). While you're doing this, make sure to hit as many cones as possible, as much as possible. This will help you with the "100 Hits" achievement. Even once you've hit them, aim for them on the next lap - every hit counts.
Once the song finishes, your car will stop dead and you'll hear the game over theme. The achievement WILL unlock if you have the Autodrive turned on. However, it's not as much fun :P plus it helps for the "100 Hits" achievement already mentioned to drive manually.