What is the best method for applying floor leveler to a wood subfloor to ensure a smooth and even surface for flooring installation?

The best method for applying floor leveler to a wood subfloor is to first clean and prepare the subfloor by removing any debris and ensuring it is dry. Then, mix the floor leveler according to the manufacturer's instructions and pour it onto the subfloor. Use a trowel to spread the leveler evenly, working in small sections at a time. Allow the leveler to dry completely before installing the flooring on top for a smooth and even surface.