If you haven't dragged yourself around blearily the day after, you can NOT imagine the grogginess and emotional suffering that goes with it. Follow these easy rules and you will find it's very easy to get insomnia out of the picture. At some point the EZ sleep coffee user will have coffee turn on him. When it does, that single, morning 'Cup of Java' gives a 24 hour inability to sleep especially if it's a high voltage African coffee. That can get you for two days of wakefulness.
Quitting coffee is a headache.
If you plan to switch to decaf, take pain killers every AM for the first few days while you half the daily dose. A full cup becomes a half, then the half becomes a quarter. This regimen will make it easy to quit caffeine. Although I am verging on malarky when I say that. True, yogi tea has some caffeine but not a dealbreaker amount as the milk buffers it.