I found this on the Mayo Clinic's website.  I hope it's helpful to everyone who wants to quit drinking so much caffeine.

**Source**
http://www.mayoclinic.com/health/caffeine/NU00600

How to curb your caffeine consumption

Caffeine can be habit-forming, so any attempts to stop or lessen the amount you normally consume can be challenging. An abrupt decrease in caffeine can cause withdrawal symptoms, such as headaches, fatigue, irritability and nervousness. These symptoms usually resolve after several days.

To adopt new caffeine habits, try these tips:

• Know how much caffeine is in the foods and beverages you consume. You may be consuming more than you think.
• Gradually reduce the amount of caffeine you consume. For example, drink one less can of soda or drink a smaller cup of coffee each day. This will help your body get used to the lower levels of caffeine and thereby lessen the withdrawal effects.
• Replace caffeinated coffee, tea and soda with their decaffeinated counterparts. Most decaffeinated beverages look and taste the same.
• When preparing tea, brew for less time. This cuts down on its caffeine content. Or choose herbal teas, which don't contain this stimulant.
• Check the caffeine content in over-the-counter medications that you take. Pain relief or headache medications, such as Excedrin or Anacin, can contain from 65 mg to 130 mg of caffeine in one dose. Switch to caffeine-free versions, if possible.

If you're like most adults, caffeine is a part of your daily routine. And most often it doesn't pose a health problem. But be mindful of those situations in which you need to curtail your caffeine consumption.