Firstly, know that if you just stop drinking caffeine all at once, it may lead to withdrawal symptoms like headache, irritability, fatigue, and nausea. If you're going to cut back make sure to do so slowly over time by mixing caffeinated and non-caffeinated beverages together gradually until eventually, you are not getting any caffeine in your diet. You can also replace caffeinated beverages with healthier drinks such as tea or water. If you drink coffee only because you are tired, it is best that you go for a balanced diet to increase your energy levels, and get proper sleep at night.