Assuming we're talking about the lower form of golf, ie nonlinks golf, the answers lie out there at Chambers Bay, Quail Hollow, Royal Melbourne, Pinehurst #2, and Winged Foot:
*Length sure but angles especially
*Selective bunkering, ie to protect angles yet offer safe routes away from them
*Deep greenside bunkers (assuming there is a way to play away from them yet still make par or par and a half
*Big undulating and / or sloping greens, with lots of pinnability around the edges (greens of sufficient size may allow bunkering on both sides of green, provided front has an opening)
*Sparing use of water and then only laterally, as with bunkering allowing a safe route away and demanding no long carries
To convert from everyday play to a major, grow the rough a bit longer (if you must use rough - but don't narrow, rather shave right down to the bunkers), move the tees back and shine up the greens.
Where do I claim my prize?