How do I find out what God wants me to do with my life?

Today is Ash Wednesday
i woke up at 4.30 a.m and went to church to attend service

I feel so lost now. I don't know what to do with my life.
As i stand on the threshold of life, i relized that i am absolutely too small
I am faced with difficult choices.Which way should i take?

Dear God, pls let me know what my mission in this life- which you predestined for me- is?

http://www.focusonthefamily.com/faith/spiritual_development/finding_gods_will_for_my_life.aspx
http://www.mauricelindsay.com/are-you-living-a-life-of-passion-and-purpose/