How Can Single Individuals Serve in the Church?

In my previous article I spoke about several aspects of the single life that may be difficult for a single church member.  I mentioned in particular that I worry about not being useful or of value to the church. I would like to expand on this by exploring the idea of how single individuals can in fact be of significance and even important to the church.  This can and should come through our acts of service. Writing this was quite intimidating for me.  I can in no way pretend to be an authority...