What has God given you? Think about the gifts and talents He's given you. Think about the things that come easily to you, that you enjoy doing. Are you sharing these gifts with others? Are you using them to minister to others? To minister to God?
If you aren't, you should be.
Start now. If there is no outlet for your particular gift, make one. If there is some deep desire in you you want to pursue, do it.
Don't make excuses. Don't rationalize your inactivity. Just do what you know you should do.