User blog:ErrorZip/Preps for hardmode?

I have got to the stage where killing the EoW and EoC is easy, i have full molten armour, spectre boots, cloud in a balloon, a bunch of potions, minishark and the Nights Edge along with max mana and health. Are there and other items i need before going for hardmode? and should i set up protection on my house? e.g. dungeon brick walls.