The Wrong Shoes

What are the early signs of Alzheimer’s? I am sure I have blank brain spots where information used to be. Is there a way of increasing your brainpower once you are over 30? I heard once that the number of brain cells you have is your lot for life. If that is the case I am f**ked. I left my little man in nursery this morning with his shoes on the wrong feet, it is a wonder I am left responsible for the dog never mind another human!