Vocation is a great thing and a strange thing.
All of us have a vocation. A vocation is about doing more than you are asked to do. Not just working for a wage, but working because you want to contribute more than the usual. Working for love.
We are all called in different ways. God called Samuel three times and Samuel rushed to Eli. He did not hear the voice of God until Eli explained.
In short he did not listen. He took the easy way,
or what seemed to be the obvious way.
In prayer we must LISTEN.
Many people are busy saying prayers, telling God their troubles requesting help. The result of all this is we never allow God to touch us, because it is all about me. Prayer must be and is about God.
Just sit silently conscious that you are in the presence of God. Let Him do the talking.