Did you know that you can add copied text the register that already contains copied text?
Suppose that want to copy One and Three and paste them at the top of the file.

One
Two
Three

First, copy One to a named register (can be any one) "ayy. Then move the cursor at Three.
This time, use capital A: "Ayy. The text will be appended to the register a. Go the top of the file and paste text as usually with "ap.

That’s it!
This protip has been written in 535 seconds