To get ready for the change in patch 5, here are a few good resources that can guide thinking, and steer away from panic and fear of the unknown.
- Wowhead’s Class Guide
- Wowhead’s MoP Talent and Glyph Calculator
- MMO Champ’s Class Discussion forums
- a list of Icy Veins class guides
- EJ’s Class forums
These are pretty much in order that you’ll be able to use them. There might be others around which are more specialised, but these are an excellent jump point.