A friend emailed me this. Quite amusing and true, I believe.

10 Biggest Brain Damaging Habits
1. No Breakfast    
  People who do not take breakfast are going to have a lower blood sugar  level. This leads to an insufficient supply of nutrients to the brain  causing brain degeneration.

2. Overeating    
  It causes hardening of the brain arteries, leading to a decrease in mental  power.
3. Smoking  
  It causes multiple brain shrinkage and may lead to Alzheimer disease.

4. High Sugar consumption    
  Too much sugar will interrupt the absorption of proteins and nutrients causing malnutrition and may interfere with brain development.

5. Air Pollution
  The brain is the largest oxygen consumer in our body. Inhaling polluted air  decreases the supply of oxygen to the brain, bringing about a decrease in  brain efficiency.

6. Sleep Deprivation
   Sleep allows our brain to rest. Long term deprivation from sleep will accelerate the death of brain cells.

7. Head covered while sleeping  
   Sleeping with the head covered increases the concentration of carbon dioxide and decrease concentration of oxygen that may lead to brain  damaging effects.

8. Working your brain during illness    
   Working hard or studying with sickness may lead to a decrease in effectiveness of the brain as well as damage the brain.

9. Lacking in stimulating thoughts
  Thinking is the best way to train our brain, lacking in brain  stimulation  thoughts may cause brain shrinkage.

10. Talking Rarely  :)

    Intellectual conversations will promote the efficiency of the brain.