What are some quotes from The Outsiders that depict what advice Ponyboy should follow?

In Chapter 6, Dally comes to visit Ponyboy and Johnny on Jay Mountain. He then takes the boys out to eat at Dairy Queen. While they are eating, Johnny says,

"I said we're goin' back and turn ourselves in" (74).

Ponyboy would be wise to follow Johnny's suggestion and turn himself in. Ponyboy would not be responsible for the death of Bob Sheldon, and his brothers could finally stop worrying about his safety.

After Ponyboy witnesses Johnny and Dally's deaths, he becomes extremely depressed. These traumatic experiences leave him feeling apathetic and hopeless. Ponyboy begins to struggle in school and is failing several classes. In Chapter 12, Darry has a conversation with Ponyboy about the way he is living. Darry says,

You're not going to drop out. Listen, with your brains and grades you could get a scholarship, and we could put you through college. But schoolwork's not the point. You're living in a vacuum, Pony, and you're going to have to cut it out. Johnny and Dallas were our buddies, too, but you don't just stop living because you lose someone (148).

Ponyboy would be wise to follow Darry's advice. At this point in the novel, Ponyboy is so traumatized that he cannot enjoy his life. Darry is encouraging Ponyboy to stop feeling sorry for himself and start living his life again. Eventually, Ponyboy reads Johnny's letter, which inspires him to write The Outsiders.