Could it be that you aren't really focused on the mission God has prepared for you?
God wants you to be active and engaged in helping people encounter and follow Jesus. That includes your daily life.
Philemon verse 6 says it this way:
I pray that you may be active in sharing your faith, so that you will have a full understanding of every good thing we have in Christ.
If you want to revitalize your spiritual life, the quickest way is to become active in sharing your faith. Before you go stake out a street corner, buy a bullhorn or a sandwich board and start making a list of faith enhancing statements like "turn or burn", let me give you an easy first step.
Take out a 3X5 card. Ask God to give you the names of three people that you interact with who don't know Jesus. Begin praying for those people every day. Ask God to save them and to give you the opportunity to be a part of it. Start to watch for opportunities and see what God does in their life and your faith.