World of Warcraft/Classes/Priest

Soloing
When you start as a priest and that you consider playing solo, I would recommend that you put all or most of your talent point into the shadow section. While Holy is a really nice class to have to cure people, shadow is a strong damage dealer that will help you kill creatures easily 5 levels above you.

When you reach level 50 or above, you can now pay one gold to change all your talents to holy since it will be more useful in big instances.