Here's a great idea (via AVweb): using Microsoft® Flight Simulator as a training aid:

Here's how Microsoft Flight Simulator as a Training Aid helps aviators get the most out of every hour in the air or the virtual skies:

• Student Pilots can use the information in this book to enhance book-learning, review specific concepts and skills, and in preparing for formal flight instruction.
• Certificated Pilots can complement real-world flying with additional hours in the virtual skies, upgrading flying skills and learning about advanced aircraft and procedures.
• Flight Instructors will discover new ways to use Flight Simulator as a teaching tool in ground school classes and pre- and post-flight briefings.
• Virtual Aviators (Flight Simulator hobbyists) will learn more about real-world flying and enhance their enjoyment of virtual flying.

My dad got a copy of the latest Flight Simulator version for his birthday, and even on his old clunker of a computer it looks incredible. On his computer it's a little jumpy as the display sometimes lags behind the simulation, but if you're training to do holding patterns or instrument approaches, the realistic ground display isn't helpful anyway.

Someday, when I have oodles of time, I may pick up a copy for myself.