Many racers use Setup Sheets to record how they set up their cars, and then they share their setup sheets, so other racers can learn from their setup strategies.
To get the most out of a setup sheet, look for setups for the same car and with similar track conditions (e.g. "hard-packed dirt, medium grip".). Check out their suspension, shocks, and tires to get ideas on how to improve your own setups. Then, use the So Dialed RC Setup App & Race Log to record and manage your setups, so you remember what worked (and what didn't!). Remember: you can't improve what you don't measure!