When you find yourself trying to remember a show (or any works) that's on the tip of your tongue but just out of reach, come here - the collective brain of the TVTropes community can probably help. Post all the details you can remember (examples help). If you're looking for a trope, head over to Trope Finder. Have general questions about tropes? Visit Ask The Tropers!
I think this is probably the Enchanted Forest Chronicles, although some of the details don't exactly match.
The first book is about a princess who runs away from home and becomes a dragon's housekeeper. She befriends another princess who is being held prisoner by another dragon, and, separately, a prince who was turned partly into stone from a near-miss encounter with a curse.
I think the bit about the leylines and the wizards' staves is in one of the sequels.

Looking for what I think was a children's book. It featured two princesses, one of which who might have been turning to stone, a dragon that was described as having a voice like a bell, and the not-stoned princess had to go on an adventure to save the other despite being told not to because she is a princess. I think she ended up being the dragon's maid at some point as part of a bargain at some point? Also, it might have been a different book or the same, but I remember something about a wizard being able to see the laylines of energy that control magic- most wizards twisted these magic lines around their staves and he had to subtly redirect the leylines whenever another normal wizard came to visit?