Pick It Up

If I see a project falling behind, or someone slacking, I would simply ask them, "How are things going?". This would be just to give them a heads up, or at least help them archive it in their short term memory. I am a straightforward communicator, so if I see a co-worker of mine that needs to get on a project, I might give em a little "Hey you need to get on that, it was due.....or it is due and 'we' still haven't come up with anything. " It's simple. (Maybe not for others). As for motivation, I think that it is important to help the person recognize all of the successful things they have accomplished, and how their continual efforts is the only way the project will be successful.