I'm almost 40 and I'm much more aware of the circumstances when my mental ability are worse. If I want to be at my peak, sleep well, not have breakfast, drink a

I'm almost 40 and I'm much more aware of the circumstances when my mental ability are worse. If I want to be at my peak, sleep well, not have breakfast, drink a cup of coffee. Under these circumstances I think I may have better mental ability than 10 years ago.