I'm staring at this molecule with a look of uncertainty...
When I started my professional development career, I joined the bandwagon of most geeks and consumed caffeinated beverages like crazy for 8 hours a day... Putting down cups of coffee until I left for home for the day.
And I noticed on days when I didn't have as much during the afternoon, I started crashing hard... struggling to stay awake at around 3pm...
So I decided to pull a "I have a strong will" move and go cold turkey... I had previously done this with alcohol (went alcohol free for 9 months, just to prove I could do it)... but let me tell you, going cold turkey on a serious caffeine addiction was hard. Headaches, muscle aches, stomach cramps, you name it...
But now... I enjoy some caffeine here and there... A pop a few times a week... a coffee a few times a week...
The hard part is that now I notice the affects of caffeine on my body and in the case more recently when I feel tired in the mornings and less motivated, it actually helps me become focused and work harder... making me think twice about starting a "one cup a day" regime...
But I'm also scared I'll run into the same problems I did before... Thankfully for now I have a french press that does 2 US standard cups of coffee (label says 6 cups, meh)...
We'll see...

I've quit in the past and only had a cup here and there, but gradually worked back up to my current dependency. I dont think i could quit cold turkey.
Getting a good night's sleep helps though.