Get past police car:
Drive in a police car to race past other police cars. However, if you hit or even tap a police car, it will chase you.

Getting airborne:
In the Keeping It Up level in London, after the turn with the café tables and chairs, turn right onto the sidewalk. Stay there, and you will see an incline. Go over that incline and your car will become airborne. Do not land on the building or the lamppost on the way down or you may lose Dave.

London: Remove damage:
Drive to the junkyard and find the red car located near the entrance. Race that car around the junk yard to remove the damage from your vehicle. The bus is recommended.

Turin: Hidden job:
Drive to the roundabout and take the first right. Drive forward to reach the parking lot. Hit all the cones to get a job offer. Follow the on-screen arrows to get the job. The police car is recommended.