True servanthood
Why are we always excepting rewards and "bonuses" for doing God's will. We are His servants, and our obedience all works towards His master plan. You'll likely never see the "full" impact of your life in His story. You are not the star of the show, merely a servant yet your part is crucial to the story. When you have finished a "task" for God, don't immediately be expecting His reward. His reward will come in due time, but in the meantime you should have the attitude that you are really for anything that God swings your way. You never know when God might need you for His glory. Will you say "Yes!" to His request?