-Look for different routes on your in-game map while driving. These can get you ahead of an opponent easily or shave off seconds on your timer. They will look like another road on the map, but occasionally are narrower. Most of the time these shortcuts will be hard to see or take, and can be extremely risky.
-At the start of the races that take place in front of the prison Samantha told you to race to for a reward, when the race starts, crash in the gate of the prison. It is an underground shortcut. Note: This only works after the race in which Samantha tells you to race to the prison in time for a reward.