In vim I use yy and p all the time to yank and paste lines. However, if I want to replace one line multiple places in the file, I can't use yy p dd p because the dd deletes the line to the clipboard / register. While I should probably know how to use registers better, i feel like there is probably a way to p that replaces the current line.
Google wasn't much help in finding anything, and the VIM tutorials I found did not cover this. I just ordered a book from amazon but I hope someone can let me know before it gets here ;)