Our calling is to make disciples - not just help people make decisions. Following up helps our friends understand the life-changing significance of their faith decision.
Follow-up can be as simple as sending a text message, or as in-depth as inviting them to a new-believers bible study. In any case, having a plan for follow-up is a gift for our friends after they make a spiritual decision.
Decisions are difficult to measure, but we can make the most of our efforts by organizing well and setting good goals.