"Although physical exercise helps improve your brain health, brain exercises are a great tool for developing or maintaining a mind like a steel-trap.
Lumosity.com is a new site offering a complete brain fitness program. Designed by neuroscientists, their program has been scientifically demonstrated to improve your memory, attention and processing speed.
The program consists of 30 sessions, each session consisting of three to five games, which automatically adapts to the difficulty best suited for your current abilities, getting more difficult as you go along. You can track your advancement and improvement as you go through the program.
Users of the program claim they have experienced clearer and quicker thinking, better memory retention of names and numbers, increased alertness, elevated mood and better concentration while on task.
For example, one game called Birdwatching is designed to improve your peripheral vision. This is an important ability in many everyday activities, such as driving, since having good peripheral vision is tied to a reduced likelihood of having an accident." (Dr. Mercola)