Have each youth write down the name of ten unsaved people that they have contact with on a regular basis. It can be friends, relatives, the lady at the grocery store, whoever… as long as they have contact with them. Collect the papers and make business card sized card stock with each student’s list on it. Take them to a printer and have them laminate them or jazz it up with desktop publishing. Give the cards back to the youth at Sunday School or Youth night and each week have the group pray for each person on the cards. If these people are kept in the forefront of their minds, they will be a lot more willing to witness.