Trying to be clever

Since I have struggling so much with the Java 8 OCA I have trying to think laterally, how can I make myself a little brighter and improve my concentration. A lot of places list the usual get enough sleep, eat well etc, which is hard so I bought a guitar. Awaiting the cable to drive signal to the PC where I can learn to play through a game called Rocksmith. I've been impressed by the 60 day videos of gamers going from not picked up a guitar to knocking out paint it black at near perfect. The other site I have found useful is justinGuitar.

The other things I am trying in my time off are pomodoro, I did not give the method a chance however with more time available I am willing to try it out for learning Java to take the OCA exam. The fitness thing is a tough one, fitbit has now been repaired and on route so at least I can get tracking my activity again.

Brushing up a Java a highly rated book was Exercises for programmers by Brian Hogan, it is similar to the daily programmer challenges with more of emphasis on learning, here is a task go make something, which is what I like. 

For Java learning I need something a little more in depth for what is used in industry, JPassion looks good for learnng as well as the London Java user group that is available remotely called JUG.