When i was in my track and field days (substitute the words to say younger :)) my coach would talk about the summer season and possible goals for it. But he would enable me to stay focused during the winter by handing me monthly training plans. The reason he did that was twofold :
1) To remain focused on the next month of training sessions that had to be worked on
2) To adjust the future sessions based on my training times
It is too easy to look too far ahead and not focus on what has to be acheived now and use that to readjust as you go forward. So with project work it is great that the team has the overall plan in their heads and knows the project objectives and goals. The focus should be on the right now and achieving short term goals.
Something that works well is to set goals for the next two weeks and ask resources to meet those goals on the project i.e. monitor based on what you need to achieve and plan the effort to ensure you have the resource available. Work with your team members to ensure what they need to have done by the end of the week (and not the start of the following week :)). Then re-adjust based on how the team members are performing on meeting those short term goals.