Sometimes, when your mind is racing, you have to make a conscious decision to slow things down. Take a mental time out. Pray. Meditate.
The eastern cultures seem to have the right idea, working this self-centering activity into the daily fabric of life. Surrounding yourself with simple, uncluttered space and furniture can help put you in this right frame of mind.
Woodworker John Clark has this peaceful aesthetic down perfectly at his Zen Wood site. The pieces he builds come from the Buddhist traditions of Asian cultures, but these gorgeous pieces could be repurposed to hold whatever is important in your life (a Bible, family photos, treasured possessions) and serve as your dedicated place to clear your mind and relax.
Who knows? While you are contemplating your peaceful surroundings, maybe you will be inspired to build a project of your own.