Gas WH currently has 1/2" hot supply line. Cold supply is 3/4".
I want to replace 1/2" with 3/4".

Can you add anything (or correct) the steps I need to take:

1) shut off water from main or valve going to WH
2) turn off gas going into WH
3) empty hot water by turning on lowest fixture in home
4) do I also need to drain the WH with a hose running to a floor drain?
5) solder new copper pipe w/ 3/4"...and also add a heat trap.
6) turn everything back on and check for leaks