From StrategyWiki, the free strategy guide and walkthrough wiki

Racing in this game can be a daunting task. It's almost unpredictable the first time you race in this game. Here are the tips to help you go through the game:

• Traffic comes in all shapes and sizes. If you encounter cars or other vehicles about to block you, be evasive by going through between the cars and aim for a safer route.
• Turbo can be obtained in a number of ways: getting close to cars, sliding and facing traffic head on with vehicles heading towards you. Once the bar is full, you can use it. If you memorise a few tracks, go for more straights and curves with minimum movements. To extend the turbo, make sure you're on the left side of the road or while driving, just watch out for cars coming head on. Your turbo will be rewarded if you can complete a lap without crashing.
• Drifting is key to winning the race. It's as simple as tapping on the brakes while turning left or right as long as you don't lose control.
• Every car has its own distinction. Experiment with each car until you find one that suits you.
• Time is ticking down. The max amount of time is 60 seconds. If you crash far too many times before you reach the checkpoint, your racing ends here.