Also consider fasting for 1 day a week (32 hrs). Its quite healthy for the body, but I also find that my brain tends to lose focus on all the nebulous dominating anxieties (work, money, school, relationsips, wars, the fact that there will never be any more episodes of Stargate SG-1) and instead it focuses on what it percieves as a more pressing threat, starvation. Which you can easily rationalize away because theres food everywhere. Gives me some mental relief and clarity for a day and its a good form of self discipline