We usually don't think of our jobs that way, but God does. Our daily work is a service to him, as Adam's was. The church is loaded with opportunities for investment. V.B.S. employed half the people of Ledgewood. Financial giving to the work of the church.
Spiritual productivity comes from investing in needs of others.
By this will all men know that you are my disciples, if you have love for one another. We have an obligation to serve others. The glory of God deserves our best effort. The great teacher Bertoldo knew gifted individuals are prone to coast rather than develop. He warned Michelangelo repeatedly, but with no effect.