Rose and Indigo communicating to other drivers through messages that Rose shows from the car windows to help Caddy drive.
Caddy restoring Saffy's angel at the end.
Rose being the one to make the breakthrough with Tom Levin, and breaking down the barriers between him and Indigo so that they can become best friends.
Rose crossing a heavily trafficed street to see Tom, landing on the sidewalk after so impulsively darting past the street to see him that he catches her. It's the beginning of his looking-outside-of-self Character Development.
After having been read Le Morte De Arthur to her by Indigo, Rose paints a picture of Tom on the wall - as Sir Lancelot.
Rose attempting to tell Caddy why she stole her ring, only for her to end up at her father's flat and find herself on a plane going to New York - where she knows in her heart Tom is.
Caddy Ever After:
Forever Rose: Tom choosing Rose and going over to England as a Christmas present instead of the usual gifts. It made Rose's day, and also made the shippers happy.
'CURSE OH CURSE OH CURSE. CURSE ALL ICELANDIC WITCHES. MAY THEY BOIL IN ICELANDIC MUD. AND CURSE THAT BLASTED BOY. CURSE ALL MALE CASSONS. GRINNING PERFIDIOUS WRETCHES. INDIGO CASSON, CURSE YOU. OUT OF MY LIFE FOR EVER AND GOOD RIDDANCE. HA'. On the word 'ha' Sarah fell silent, but we in the hall did not.
Made even better by Rose, who gets her own Crowning Moment of Awesome when she goes home and confronts her brother with these words: 'Sarah thinks you are exactly like Daddy.' Indigo looks utterly stricken.Which I think is a very good sign. This confrontation effectively saves Indigo and Sarah's relationship.