While using the bus in the dare levels during a race, just push the other cars to build up hit points.
When you complete 20% of the career mode (80% remaining), make sure to have one fast car for racing rounds and a cheap "D" - demolition car for demolition rounds. Modify your demolition car with a reinforcement upgrade only. For your fast car, do all upgrades. This saves money and constant churning of cars.
Drive around avoiding cars until there are less than four cars remaining. Also, drive your car in reverse to avoid damage to your engine.
When in career mode, go to an out-of-town event and enter it. Make sure that you use a fast car and that it has the big "D". After the loading screen, speed off and get ready to press A when the screen appears to race the other car or not. If you pressed it fast enough, your car will be going fast with a 7 to 23 mph head start.
Stay to the inside of the track to avoid the oncoming onslaught of cars.
Drive past the turnaround point until it says "Get back on track." Press Select to put yourself in the opposite direction (it is faster). Additionally, tapping Black (emergency brake) and going to the inside all the way to the grass is the easiest way to win a Turnaround race. Going in the grass on the inside line to helps you avoid oncoming traffic.
Boat Race Movie- Obtain Rank 70 in Career Mode.
Camper Race Movie- Obtain Rank 30 in Career Mode.
Car Soccer Movie- Obtain Rank 10 in Career Mode.
Chain Race Movie- Obtain Rank 80 in Career Mode.
Compact Derby Movie- Obtain Rank 90 in Career Mode.
Derby Basics Movie- Obtain Rank 60 in Career Mode.
Derby Strategy Movie- Obtain Rank 50 in Career Mode.
Extreme Movie- Obtain Rank 1 in Career Mode.
Figure 8 Bus Race Movie- Obtain Rank 20 in Career Mode.
AI Vengence: Become the #1 ranked driver in career mode
Buh-Kwawk: Max out the hit meter 15 times in a career eve
Chicken Fight: Destroy your car within 55 seconds in action mode
Deadly Ambition: Disable all cars in a point to point race
Fast Forward: Win a figure 8 jump race without any damage
Hardcore Mode: Wrangle a car in 9 seconds
Old Time Racing: Gain 100 kills in career mode
Turbo Boost: Successfully complete all of the dare mode challenges
Ambulance: 40000 Reputation Points
Baxter: 45000 Reputation Points
Bulldog: 5000 Reputation Points
Cannon: 10000 Reputation Points
Dundas: 15000 Reputation Points
Empire: 20000 Reputation Points
Hastings: 2500 Reputation Points
Hearse: 500 Reputation Points
Kenyon: 30000 Reputation Points
Mankato: 55000 Reputation Points
Orbital: 50000 Reputation Points
Outlaw: 35000 Reputation Points
Postal: 25000 Reputation Points
Rocket: 65000 Reputation Points
Taxi: 60000 Reputation Points
Welch: 70000 Reputation Points