"Optimize" is a funny word to use in this question. It is certainly possible to improve performance, but I don't believe that there is an optimal performance standard.
Your brain is comprised of nerve cells which communicate with each other by means of connections called synapses. Each synapse is comprised of an axom and a dendrite. The more of these connections you have, the more efficiently your brain will operate.
Like a muscle, your brain will get "stronger" if you use it. Critical and analytical thinking will cause your brain to generate more connections. Conversely, passive activities like watching television, will cause these connections to be torn down. So you can achieve better performance by engaging in activities like reading, blogging, etc.
Some people tend to be dismayed by the fact that people only use a small percentage of their brain, estimates range from 6 to 10%, but actually if your brain were much more active than that it could overheat. Certain neurological disorders like epilepsy and narcolepcy that cause seizures or periods of apparent unconsciousness are characterized by brief periods of high activity in the brain, so more activity is not necessarily a good thing.