There is a book called, 'How To Get My Life Right?'. It begins with describing vocation as an encounter. And in order to really encounter something or anyone, there are certain conditions required. One of them is openess.
When we meet a person sometimes we are so determined to tell them the latest news especially if they are close friend. The conversation could start like this,'You will never believe what happened to me!' or 'I have something really important to tell you' or 'Guess what happened'. I think this could be an example of a barrier especially when it comes to vocation. There is nothing wrong with telling your friend stuff but there is something wrong with always being the one talking and everything is about you. This doesn't open you to an opportunity to really getting to know your friend. Usually when your friend does something you never imagined they could do, it shocks you. For example, if she dyed her hair red or he actually choose to play tennis. May be you never really got to know them. May be you weren't open to their uniqueness, their likes and dislikes. your view was limited to just ME.
Vocation means becoming less me centered and more others centered. Every vocation is just about that loving God and loving others. It is a way through which you love God and you love others. Sometimes I think that we get so engrossed in finding out our vocation that we forget it's about LOVE. I don't clearly remember but there is a book called,'Personal Vocation'. I'm so sorry but I forgot the authors. However it says that vocation is not solely about the state of life a person chooses. That is, marriage, apostolic celibacy, priesthood or religious life. What if you die right now while being confused about which one to pick? Does that mean you have been living a purposeless life all along? I don't think so. As the reply above mine states, God speaks in the little things that happen each day, in a small voice. The focus should be on me, my and mine but on her, he, and they. You are so focused on my vocation while abandoning everyone around you seeing them as a complete waste of time and as obstacles to YOUR plans. Why not try getting out of yourself and seeing the needs of those around you. When you learn to love them , you learn to love God. It is important to realize that God has a specific plan for you but if it leads you to be more locked within yourself, there is something wrong. As I said earlier, the best way to know God's Will is to pray, to frequent the sacraments and to go for spiritual direction. What I have said could be off or apply differently to each case, that why it's best to consider this with someone who knows you well.
I'll pray for all young people trying to find God's Will. Thanks to all those who have contributed.