Simple mods for your 3D printer to extract the best performance

There are largely two types of 3D printer users -- those who use the stock printer as is and are happy with the performance, and those who like making modifications and upgrades from time to time to extract every drop of extra performance from their printers. When I first got my printer -- the Creality Ender 3 S1 Pro -- I belonged to the first category. However, with time, I gradually started looking for ways to improve the quality of my prints and speed up the printing process. I didn't want to spend money on a new printer since they can be quite expensive, so I was strictly looking for mods I could make to my existing printer.