Lets see:
1. Not taking leatherworking as I read that shamans used mail at level 40, and I thought it would be useless at that point.
2. Not taking engineering as I thought tuarens couldn't learn it as Thunderbluff didn't have a trainer.
3. Specing into enh at first as I didn't know what to pick and increased mana seems the most useful to any spec.
4. Not doing the quest to get the fire totem as I didn't realize how important the quest was and I already out leveled the area.
5. Not sure if I should be healing or doing dps
6. Trying to be a healer as enh
7. Not specing into dual wield as there was a talent for 2H, and I had a good 2H weapon.
8. Trying to run from stranglethorn to WPL... couldn't figure how to get past stormwind.