The basics:
1. Teeth down to rip and loosen packed soil (DON'T turn sharp with the teeth down, or you will bend your 3-pt arms).
2. Teeth up to move dirt or snow.
3. Tilt the box forward with the toplink until the front blade hits first for digging and moving dirt from high spots to low spots.
4. Tilt the box back with the toplink until the rear blade hits the ground first and the front blade is just off the ground for spreading and leveling.
5. For the final leveling, keep the box tilted back and drive in walking rectangles or figure eights to make sure you hit all areas from several different angles.
6. Practice, practice, practice.... /forums/images/graemlins/smirk.gif /forums/images/graemlins/smirk.gif
You will find a lot of information with a search, but those are the basics.
For snow, I prefer a back blade, but with a box blade I would adjust it so the leading blade (depending on whether you are pushing or pulling) is slightly off the ground unless you have a hard surface, such as concrete or asphalt to keep the blade from digging in and taking a lot of gravel or soil with it /forums/images/graemlins/blush.gif.