I think it's going to be different for each kid but teaching how to be self reliant was a pretty big one for both building confidence and being willing to try and fail at things, face your fears, etc. Don't know what a word means? Look it up. Not sure how to cook something? Check the recipe. Bored? Go to the library or park, etc. learning how to figure things out for yourself in a safe, stable environment seems to make a big difference.