The best for starters is a pulverizer with a hooper on top next to a powered furnace with a chest on top. Once you get your industrial grinder going non-stop (producing more then 128 eu/t from your power net) it becomes the best thing to grind your ores with. Also note that you can have up to 4 grinders at the same time sharing the machine casing multiblock.
Also if time does not matter then factorizations ore tripling system is worth a look but takes 20 min or so to triple one ore.