(The real loser is our literacy rate)
  1. You're vs Your
  2. Their vs They're vs There
  3. Then vs Than
  4. Affect vs Effect
  5. Irregardless vs Regardless
  6. I vs Me vs Myself
  7. Who vs Whom
  8. Lactose Intolerant vs Lactose and Tolerant
  9. For All Intents and Purposes vs For All Intensive Purposes
  10. I Could Care Less vs I Couldn't Care Less