Place the honey in the carboy. Fill the carboy half way with hot water and dissolve everything well. Add your yeast nutrient, and fruit acid, and mix well. This should ferment vigorously, so you may not want to fill to the 5 gallon mark at this time. This is the point in time when you may wish to add any extras to the must.
Traditional mead is made from honey and water alone.
Addition of the orange juice concentrate will make the mead into a melomel, which is just mead with fruit juice. Melomel made with grape juice would be referred to as pyment, and apple juice mead is cyser. The addition of herbs such as ginger, cloves, nutmeg, dried mushrooms or fruit, or rosemary result in a beverage called metheglin. Hippocras is mead made with honey, grape juice, and some of the fore mentioned herbs. Generally juice concentrates are the easiest to add, though crushed fruit would work also.