How do we reach the Lost

How do reach the lost that do not know or understand that they are lost? As I sit here and watch people in this busy coffee shop. Some of them is easy to see the loneliness in their eyes. How do reach those who don't know their need for a saviour. How do get into to fellowship with them. Reach them in the midst of their darkness? Do we wait to build fellowships with them. How can we reach the lost in the places we go on a day to day basis. How do they learn their need for a saviour. Lord do not us pass up an opporutnity to share the good news of Jesus.