From my own experiences, there are usually four key areas where problems can originate and keeping those in view and in check can help keep project resource management problems to a minimum. Adding focus to them during problematic times can also help reduce or resolve resource issues and keep the project on the right track.
Aim for a conflict free project team. Conflict on the team can be deadly to the project. It needs to be resolved quickly and in the best interest of continuing forward and hopefully uninterrupted progress on the project. Meet with conflicting resources and gain quick resolution whenever possible. Meet separately and then as a group. Can the conflict be resolved? If not, then action must be taken and - unfortunately - that usually means replacing one or more resources which can be costly and risky to the project. Don’t do it unless absolutely necessary; the quicker you take action the quicker you will be back to productively moving forward on the project. No room for procrastination and conflict here....