Get all your written work done first. Do the pre-solo test and your PPL written. Get your third class medical done, so you can solo when ready. Study and "chair fly". Fly 3x/week, but don't fly more than your learning speed will allow. Remember, the cockpit is the WORST learning environment. It is there for you to practice what you have learned. Your instructor should be able to combine some lessons too. Like VOR tracking to/from the practice area after you become familiar and hood-work here and there, so you don't waste valuable time.