Enquiry, Threat, Enforcement

When you want something doing by someone, ask them when they are going to do it. If they show no sign of task completion, tell them you are going to do unpleasant things to them if they don't do the task soon. If they still refuse, use whatever punishment is necessary. This technique, possibly the basis for most US foreign policy, is here dubbed ETE - Enquiry, Threat, Enforcement. I think you'll find it works well as an approach to almost any problem