Colossians 4:17 says, "Take heed to the ministry which you have received in the Lord, that you may fulfill it."
That's what we're talking about -- the ministry God has given each of us to fulfill. Our ministry is the task God has given us to do. And if it is a task from God it is of eternal importance no matter what others (or even we) may think of it. We cannot judge the tasks God has given us to do with comparisons to other people's tasks or to world ideologies of what constitutes significance.
We each have unique ministries. Sometimes we Believers can get caught up in the ministry thinking the only valid and important ministries are public ones and those acknowledged professionally as ministries. This is not the case.
If you are married, one of your tasks from God is to support and love your spouse.
If you are a parent, one of your tasks is to raise your child in the faith and teach that child to become an independent adult (as he/she is able).
If you are part of a church, one of your tasks is to help build up and encourage other members of your church family.
If you are human, one of your tasks is to be authentically you. This one is more important than you can even fathom. Only you can be you. Have you noticed are powerful it is when someone shares honestly and vulnerably and is just so real? We all can do that (but it sure takes courage).
If you have people in your life, friends, co-workers, family members, one of your tasks is to watch out for them. Give them words of encouragement. Pray for them. Notice what is going on in their lives.
You have also been given at least one spiritual gift (you really need to become a Believer to operate in this. If you aren't a Believer yet click here to find out how to become one (it is the best decision you can ever make. It will affect every aspect of your life if you let God work). We Believers are called to use our spiritual gifts for the building up of the body. If you don't know what your spiritual gift is, click here to help you figure it out. The linked page isn't the only resource online but it is a good place to start.
Reread the Bible verse above (Colossians 4:17). Here is how The Message says it: “Do your best in the job you received from the Master. Do your very best.”