Tips for Decreasing Caffeine?

Wanderlust • Left Glow.
Anyone willing to share how you were able to decrease or eliminate caffeine while TTC?  I currently have switched from coffee to tea in the morning, and then I have one caffeinated soda each afternoon.  I would love to eliminate caffeine altogether, but I am afraid of the headaches.  Is there a way to quit caffeine without headaches?  Or should I just suck it up and go cold turkey?