In general I don't drink coffee, but two days ago I had a long day.
Up at 8
1st job paperwork 9-11am
feeling beat, Vietnamese Coffee on Ice(expresso with condensed milk) with lunch.
2nd job.. labour from 12-3.. then paperwork until 5
then 5-6:30 meeting and discussions on the phone/fax
with China (9-10:30am their time)
Grab a starbucks grande latte for dinner (no food)
then I have a night class at 7:00pm
(business Chinese (Mandarin)).. Other student, 50y old businessman, does not show, so I am HU with the teacher and I'm sharp
for the 2h30.
Home at 10
m..
Check my email for replies from China..
11-12 eat a noodle and try and relax.
I fall asleep at 12:30 but then I am awake at 4:00am and I can not fall back to sleep. I get up and review my work for 3 hours until the kids wake up at 7am.
By about 2:00pm that day, (no coffee, I am falling asleep at my desk.)
I manage to hang on till 3:30pm but then tell my associate who does all the Chinese translations, that I am going.(lucky that I'm the boss)
At home i snooze from 4-5, but then I get up for a short meeting at 5:30 which I want to re-schedule, but I make instead... Then family stuff until 8:30pm.
I fall alseep at 9pm and do not get up until 7:45am.
My normal routine is 1:45-2am sleep... 7:45-8am wake up.
I used to do that for weeks when I was playing poker.
Moral of the story
More than one coffee per day messes me up.