#7 is just Microsoft's Format Painter, isn't it? Highlight the text format you want to copy, click this button: and select the text you need to change.
If you need to change text in multiple places, double-click the painter button and select whatever text you want to reformat anywhere on your doc. It works across different docs, too, so if you have a header format you like in one doc, highlight it and click the button, go to your new doc and paint that format on whatever text you want changed, and then you can paint any other text with that format on that doc, too.
Format Painter is a universal feature in Office. I use it WAY more in Excel than in Word.
The Quick Parts trick might be something to play around with, but it seems from the description that I'll have to take hands off the keyboard and mouse-click something, whereas with AutoText I just type my shortcut and hit enter or space or whatever, and my word, phrase or paragraph pops in. I use AutoText A LOT, and the benefit to keeping your fingers on the keys is huge.