How else do you fill up your ministry and make it full? Well, “this is just horse sense” as my father used to say: Look for the natural outreaches of your basic ministry.
If you asked for your “just desserts” you would get God’s judgment; ask for His grace and His mercy in Christ so that you can have His love and His blessed Holy Spirit.
There has to come that point where all that you are is turned over to the control of the Blessed Spirit of God for the purpose of bringing people to Jesus Christ.
Give time to God’s Holy Spirit to quiet your heart. Most of us just rush in to God’s presence, say a few words, and rush out again. Take time to get quiet before God.
Now, what about this matter of agonizing in prayer? Are you supposed to make a production of it? No, not necessarily. But there is an earnestness in prayer that takes you beyond the polite little speeches that we generally give to God and label as prayers.
The way you live, the service you give, the lift that you offer to someone, the love and compassion that you show… this is part of ministering, sometimes far more important than the sermons we preach.