In a race, one thing is certain, you can't predict what will happen and so you need to prepare for everything. You can prepare for it physically and mentally, but it will surely help if you have the best car of them all. By best car, it means that you have the most upgraded car.
In this game, you need to get in the top position for you to get a reap of the reward money. You have a booster, but it will need some time to refill. Try to stay on the road, so you won't slow down and always stay away from those billboards as you might crash if you are too close to it.