We've noticed a clunking noise coming from the front suspension of my wife's van for over a year. It was only noticeable at slow speeds over rough terrain. Recently, another creaking noise developed so I figured it was time to look into it. Turns out that the sway bar link was bad. After a quick and fairly cheap replacement, the noise is gone. Check out the video to see how to perform this repair on a 2005-2010 Honda Odyssey. The process of replacement is very similar on other vehicles.
Here's the link to the video if it's not showing up on your device.