Some people have a more formal calling, be it in the clergy, to working at a place to help the needy, while others, which includes the bulk of us, our rolls are not so clearly defined. This is important to note, that God works with us on our scale and level, so don't feel bad that you could only feed one hungry person, or that you could only pray for a few minutes, it's the collective that counts and setting a standard and example for others to follow, can take the action of one, and turn it into the action of billions.
The struggle that we face in this modern age, where we are being constantly entertained, we can get lost in the mix and forget that we have a job to do, and this life gives us a very limited amount of time to make our mark, for winning souls over to Christ.
So, my question to you, what are you doing to spread the gospel? Don't feel bad if it's just what you think is a small thing, any thing for the winning of souls for the kingdom of God is counted more precious then gold!