Perfect game plan. Along with some diplo to ensure no-one DoW's on you early. The ones you really have to watch out for are people like Shaka and Alexander, they usually DoW pretty early on. So if you're right next to them at the start you might want to build some units. You want as many cities near food although its okay to build a crappy city to secure an important resource (horse, copper, stone, marble). The premise then is to select some cities that are "good" (production cities or gold cities) leave those relatively pristine but then whip the crap out of the rest to speed up your military push.