You must treat every repetition as if it were the most important repetition of your life – and you must have utmost disdain for the less than awesome repetition. When counting repetitions, for every bad repetition I do, that erases ten good ones from my count… this way I can erase the bad repetition from my muscle memory and make sure that this form of punishment keeps my body and mind focused on each repetition. All it takes if for you to get lazy with one repetition… before you know it, every repetition gets lazy. Remember the old expression, “Practice Makes Perfect”… well, it is NOT true… it’s PERFECT PRACTICE MAKES PERFECT! Think about that and what it means…  For instance, if you want to drill your pumse, I would recommend you start with the weakest segment first The more energy you have, the easier it is to focus on your technique.