Slow is smooth, smooth is fast.
This is perhaps the most important side to rally. Sending it into every corner expecting grip is a sure fire way to end up in the bushes.
Very important factor in rally titles are:

- Throttle control: This doesn't just go for acceleration, but deceleration too. Being steady and trying to feel and find the grip is your best course of action (e.g. Noticing when Force Feedback changes, or when the front/rear start slipping or understeering).

In a high speed section especially, you may be tempted to lift off throttle and coast, thinking that will be the safe solution.
But that allows inertia to take your car where it wants to go. Staying on throttle ensures that the car is going DOWN the road where you want it, and let the tires physically dig into the surface, as opposed to rolling over the surface.

- Braking: Use the brakes way more than you think you should. On loose surface you want to use the brakes to control the cars weight, which will influence oversteer and understeer and allow you to better position yourself for an upcoming turn.

Adjusting controller sensitivity can greatly improve handling and responsiveness as well.

Most of these settings that I'm sharing can very between players but feel free to give them a try, especially in the sensitivity settings.