1.) You Can’t Count Cups
You may have heard that a cup of coffee averages 100 milligrams of caffeine, but remember a cup is only 8 fluid ounces. How large is your cup of morning Joe? You might need to do some number crunching.
2.) You’re Not Sleeping Enough
There’s no disputing that caffeine is a stimulant and some folks find that they are more sensitive to it than others. Be smart – if you know that taking in caffeine later in the day disrupts your sleep – skip it and get some zzzzzz’s.