Reddit mentions of Organic Chemistry, 5th Edition

Just don't go into the class with your head down, thinking it will be a walk in the park. I've seen people do that and then are devastated when they're completely lost a month into the class.

Tips:

• read your textbook
  
• read the lecture notes
  
• try to do practice problems in your textbook for each chapter your class is covering, practice is what got me an A in the course
  
  
  My lecture used the following textbook:
  http://www.amazon.com/Organic-Chemistry-Marc-Loudon/dp/0981519431
  
  
  I really like the text. It was very helpful.

The one I'd probably want: chemical manipulation. Stick your finger in a glass of apple juice and make cider. Slap someone you hate and give them third-degree burns.

Limitation: you can only cause a specific reaction if you know how it works. THIS IS YOUR LIFE NOW.

Other ideas:

• "Invisibility" through warping light (i.e. active camouflage), but at the cost of being able to see anything. If the light passes around you, it can't enter your eyes.
  
• The ability to control objects' speed or momentum, but only as long as you're touching them (you can slow down projectiles, but you'd better have hella good reaction times).
  
• Healing/regeneration, but with the same caveat as above. And the same outcome.
  
• Aura transfer, for purposes of both healing and murdering. If your own Aura gets depleted, though, you automatically leech it from anyone you touch.

Honestly my favorite text book would have to be Loudon's. It seems to cover more then most other texts and contains numerous helpful diagrams/tables. The questions are all great as well. Linky