Just a quick tip for when you’re working with a Windows based computer. If you have an open dialog box for changing settings/options/whatever you will often see three buttons at the bottom: Ok, Cancel, and Apply. Here are the explanations for what each button does.
Ok – saves all settings as modified and closes the dialog box
Cancel – discards all changes to settings and closes the dialog box
Apply – saves all settings as modified and leaves the dialog box open
Therefore, there is no reason to click Apply then immediately click Ok. Just the Ok button will suffice. Clicking Apply then Cancel is equivalent to Ok. Clicking Cancel will only discard the changes that were made since either the dialog box was opened or Apply was last clicked, whichever is most recent.
I know this is simple, but it is potentially helpful.
In the spirit of 
When it comes to annoying, mundane computer tasks, renaming or editing filenames one at a time is near the top of the list. I have recently revisited a useful utility that nearly eliminates this chore. I have used this program for about 4 years, but just recently downloaded the latest version which has added many new features I was not aware of. Some of the capabilities of the program include: adding sequential numbering or lettering, subtracting or adding any defined characters, editing extensions, adding dates into file names, changing mp3 filenames using the ID3 tag info, as well as many other useful options.