I suggest tossing out the "Lose 30 lbs. by August" goal if you want to stay serene on any diet. Your body's going to adjust to a new diet independent of your conscious goals. Insisting that it do otherwise could be a setup for frustration.

Other than that, the key to success is to follow the diet plan rigorously for the first 8 weeks, including plenty of water (many folks here drink 3 liters/100 oz. per day), taking potassium supplements (you can lose a lot at first, if you don't supplement), and spread your nutrition over the entire day (e.g., don't cram all your protein in in the morning, or all your carbs in in the evening). Bodies tend to like a steady supply of nutrients.

Much success to you!