Exit and resume

What would be the best way to stop a routing work let’s say hafway, close uccnc, shutoff my 840 and the computer and then keep on where I left the day after. The way i came up is: save the offset when I zero for my job, start my job, feed hold when i want to stop, take note of the line number where I am at and then shut everything off. The day after i would recall g54 and run the program a few lines before the one I had the program stop the day before. Wonder if there is any other more automated way