A common method for heating a cold car is cranking the dial on the temperature to full red, and blasting the fan on its highest setting.
But if your destination dictates you drive for more than a few minutes the car soon becomes uncomfortably warm, and then you need to adjust to an extreme in the opposite direction. You end up taking 1 step forward and 1 step back until you land somewhere in the middle.
Work can feel the same way; an extreme amount of effort at the beginning of a big project can lead to having to compensate by back pedaling in the other direction.
Try keeping things regulated. Put the temperature dial close to the middle, and keep the fan at a medium speed. Acknowledge that your work will take more than a few minutes and accept that your project may be slightly slower to warm up, but ultimately you’ll have to make fewer major adjustments and stay more comfortable.