I don't consider myself one of the "great ones," but here goes:
On a large surface, like doors or cabinets, I'll roll out the waterborne satin impervo with a 4" wooster pro dooz sausage type roller, then back brush it with my wooster extra firm trim brush. Smaller surfaces just get the brush. I've tried other "softer" brushes and they are a pain to work with and don't seem to provide any smoother of a surface. Practice with it before using it at a customers home, as it takes some getting used to, as it will sag and drip like crazy as it dries if you apply too heavy of a coat.