A number of physician bloggers have been providing a great deal of resources to help fellow doctors get their finances in order.
These include: strategic use of different types of retirement accounts, living like a resident until your loans are paid off, and saving a large percentage of your salary as you grow into your income.
Invest in yourself just as much as you invest in your retirement. Why not enjoy your retirement with a youthful body that can still participate in all kinds of activities?
Start to take care of your health now, while you still can. Preventative medicine is a lot cheaper than therapeutic medicine, both to you and to the healthcare system.
Start by walking more. We live in a very sedentary culture that spends 8+ hours a day sitting in front of a screen. The hospital system exacerbates the problem by continuously making electronic medical records.