With the advice and help of the State and local advisory councils, the Secretary shall take all appropriate steps to: reduce and prevent unemployment; encourage and assist in the adoption of practical methods of vocational training, retraining, and guidance; advise, assist, and conduct investigations regarding the establishment and operation by a county, a municipality, or the State, of reserves for public works to be used in times of business depression and unemployment; promote the reemployment of unemployed workers throughout the State in each other way that may be feasible; and conduct investigations and research studies and publish the results.