Motivational Aspects People are largely motivated to donate blood is they can clearly see the impact of their blood donation. You should be able to bring out the effort versus impact picture for the donor. Saying "donate blood and save a life" may be logically correct but it has no appeal. There is nothing in this line which brings out the impact more clearly. Tell them facts that show how difficult a situation it could be for a person who is looking for blood. And then show them how their blood donation reduces all the pain.