Education keeps employee competitive
Compensate employee for continuing eduction helps to keep themselves current within their field of expertise. Subscription to onlines books services is another way to achieve the same to some extend. Positive encouragement and establishing clear guidelines and systems creates a healthy working environment. I think, item # 10 helps however for short term, but something that always work.
Additional things that can help reduce work pressure by putting appropriate process and checks in place, listen to and allocate appropriate resources to the project.