Save the adjustment to an Image Adjustment Preset. You can then apply the Preset (even on import, if you want).
Note that for RAW files, you can also alter the settings in the RAW Fine Tuning Brick, and save them as a default that is always applied to files from your camera.
Do you have a hardware-calibrated monitor? If you are making exposure decisions based on sight, it is important that you are correcting to a standard (calibration calibrates your monitor to a standard) and not wasting your time correcting for out-of-standard devices.