Myself, I'm on day 2 of caffeine withdrawl. I do it cold turkey, because I just am no good with prolonged bouts of feeling unwell--and I do feel exquisitely unwell, even if I quit decaff--or deprivation.
I did pick to do it, however, when the brain fog, isn't a huge problem for me. Physically, the aches and headache have responded to aceteminophen (just one 325 mg tablet today, so that's probably all), so all in all, it hasn't been too bad. By tomorrow I'll be ready to give away all the coffee I let creep into the house since the summer.
Why do I do this to myself? Why?
I went a whole year without caffeine, had some diet coke in Mexico when I got bored of drinking water all the time--lying to myself that it would just be for a treat--and then I find myself back, royally addicted again.
Oh well. At least by Thursday I should be myself.