I forgot to recommend a website called Lumosity.com that provides games that are written by neuroscientists in an effort to help rehabilitate a person's brain after a concussion. The US Army provides it to veterans who returned from the war. Lumosity claims it can help anyone improve their cognitive functioning.

Mark In Idaho will point out that just by learning the games someone will improve - but it at least gave me something to do and I felt proactive when I played them when I was doing poorly. And now I can see my game scores and can track the progress I've made with them. I know that the progress I've made has more to do with the actual healing that is taking place inside my brain than the games but it's still neat to see on a graph. I've been playing the games since May '11 when I was unable to drive or work at all and now I'm able to work part time and drive short distances on roads (not freeways.)