I was really impressed with this - it's short, easy to remember, and designed to target the muscles that cycling doesn't reach:
WARNING: If you haven't used k-bells before, you need to pay a lot of attention to form and start out carefully - even if you are very fit. A few sessions off a properly accredited kbell coach are best, but starting out slowly with a book like "Kbells for Dummies" should work too - if you are careful. Do NOT buy the bells and just start waving them around, even if you are used to working free weights!