Every now and then, I have my moments, or weeks, when I think about dropping my math major.  But, I don't think I could ever bring myself to do it.  Math has taught me too many valuable things, and I know it has much more wisdom to throttle me with before this is all over.

Things I've Learned 

[as a Student of Mathematics]

• If you keep getting the wrong answer, go back and make sure you're working on the right problem.
   
• Know your limits.
  
  --->  If you sacrifice being a human on the altar of being a student, it's only a matter of time before you'll be doing pretty poorly at being either. 
  
  --->  Also, know the limit definition of a derivative.  It's just something you should know.
   
• Problems are better worked out with a friend.
  
  
• Sometimes the best you can do is lose every battle while winning the war.
  
  --->  Take the time to understand your mistakes, even if it seems costly on the short term, and you will eventually begin to stop repeating them. 
  
  --->  Glaze over your mistakes, and when the test comes, you'll be in a sorry state.
  
  
• If someone else's answer doesn't look exactly like yours, it doesn't necessarily mean either one is wrong. 
  
  --->  They could be different forms of the same answer.
  
  
• Some things are variables, and some things are constants. 
  
  --->  Don't forget which is which.
  
  
• When you're proving something, make sure the inductive hypothesis is true.
  
  --->  Every topple from an unstable climb started with an unstable claim.

And I'm sure I'll be adding to this list for some time to come. Feel free to comment with your own mathephors of wisdom.