Everything in Moderation

too much sleep = feel even more tired, half of your day gone
too little sleep = less energy, poor mental performance
eat too much = fats
eat too little = bag of bones
too many friends = confused whether they are genuine
too little friends = extreme boredom, lifeless shit
exercise too much = dehydration, exhaustion, feel like dying
exercise too little = fats, and other disease coming soon
study too much = go kuku
study too little = dumbass

They say 'do everything in moderation', do you agree with that statement?