Problem I noticed is the track will change through the weekend. You can figure what will happen by talking to the locals but you really don't get the feel for it till the later quals. I have now raced at most of the tracks around me more than 3 times so I know what to expect at these tracks. I normally just change tires and easy stuff like ride height but I also know I'm losing seconds by not changing anything else. This is mainly due to not being lazy but blaming my driving. With that said I just practice the day before as much as I can. I know not everyone has that opportunity.