Next on the pyramid of importance in relation to nutrition when previous levels have been nailed down is nutrient timing. For the general public this should be of small concern and a lot of it will come down to personal preference, e.g. When they eat carbs.(back loading or front loading) having your pwo shake straight after your workouts. As for the more advance person especially athletes this can be crucial in getting that extra 1-2% needed for competition. E.g of this pre, intra and post workout nutrition.