While reading the setup threads keep these thoughts in mind:
1. Most are for Time Trial. Add 1 point to the front wing, and remove 1-2 points from the suspension and/or anti-roll bars. Do not alter the alignment from the default settings if you are using tyre sim.
2. Don't trust any setup from keyboard users
3. Bram's setups are usually a safe bet
4. Whether a setup will work for you depends on your driving style. eg: Andrew is a very fast driver but he always goes for the lowest downforce setups which doesn't suit me.
5. Practice will make your laps faster than the perfect setup will. Period.