I set mine down a bit for a new track i visit, or even just the first run of the day. Then i see how it feels over a few laps. Most time it will need turning up a bit. Ususally done at 5% increments. I'll keep adding a little, till i make mistakes a bit too often overcooking it.
As you will have guessed, i'm not the best driver in the world and thats why i use this approach, to try and help myself out a little. It's what feels good to me that counts.
