Health is one's most important asset. We should build, plan, and share ways to get and stay healthy, and to make the most of life. That's why we've teamed up with Humana for the Health by Design Contest. Humana offers guidance to inform members, and help them achieve their best possible health.

The rules are simple. Enter any Instructable that promotes health, or that makes life easier for those  who have been afflicted by sickness, injury, or any disability. Your project can be small or large, simple or complex - all that matters is that it makes someone's life healthier, happier, and more productive.

So show us how you've modded your wheelchair, built a treadmill desk, or made inexpensive prosthetics for the third world. As a prize for the best ideas out there we are giving away three Wii consoles with Wii Fit Plus to encourage both health and play. Other prizes include healthy and delicious California citrus fruit, Pro memberships, t-shirts, and other goodies.

So put together an Instructable that will make life better. We can't wait to see what it is.

• You may enter as many times as you want, but each entrant can only win one prize
• Contest is open to international entries