As believers, at times, I know it can be easy to get lost in the daily shuffle of taking kids to school, cleaning the house, taking the car into the shop, working your 9-5, and then after that comes what we call "ministry".  As if ministry is what we do in our spare time, or time we have left over, after we finish all of the things that need to get done.  As if God intended ministry to be a hobby, or a recreational acitivity, that we may get to do at times.  If you have ever viewed ministry like this, then you know it goes from being an opportunity to glorify God, and enjoy Him, while meeting other's needs, to more of a chore and drudgery than anything.
I really think that it is not because we don't see the value in ministry, or even that we don't want to do ministry, but that our view of ministry can become muddy.  Ministry is not something that we do, necessarily, but it flows out of who we are.  It is because of God's great mercy in our lives, through Christ, that we are made into vessels of ministry.  We begin to not only look for opportunities to minister to others, but we actually enjoy doing it. We begin to see the person we are ministering to as "more significant than yourselves." (Phil 2:3) I don't think that it is by accident that Paul's letter to the Philippians is peppered with two thoughts: Joy and Service. 
As I read Psalm 116:12-14 the other morning, it helped bring things into focus for me, and has helped me keep the proper perspective on ministry; the proper response to what God has done for us: "What shall I render to the Lord for all his benefits to me? I will lift up the cup of salvation and call on the name of the Lord, I will pay my vows to the Lord in the presence of all his people." The primary aspect of ministry is worship, we "lift up the cup of salvation" (worship) and "pay my vows to the Lord".  The second aspect is meeting the needs of the church body.  When we can come to ministry as a session of worship to our Lord and Savior for "all his benefits to me", then we can be freed to view ministry as a joy, and meet the needs of the church.

Thankfully in Christ, Nic.