It's common at the beginning of some endeavor like a semester or a sport season to be filled with adrenaline and want to dominate the whole thing all at once. This is healthy and moreover it's a good sign for whatever you're going to be doing, so rejoice. And then calm down.
These moments at the beginning of your endeavor are unlikely to be important compared to the moments in the middle or towards the end of it. So, you want to capture your naive energy and bottle it up like a potion of Felix Felicis. Wait until you're prepping for your third final in a row, or bouncing back after the night of your most crushing defeat, or chugging through the fourth hour of a brutal five hour exam. Only then do your dig into your deepest reserves. Before then, it's just a waste.
