I am not one for dispensing tips. But here’s one anyway.
Before you leave the office on a Friday, make sure to empty your coffee mug-thermos of its contents. Why? Because if you don’t, chances are good that come Monday, by force of habit, while your mind is busy with work (ahem) and your eyes glued to your computer monitor, your right hand will reach for that green Starbucks vessel (as it has done countless times before when you’re in deep thought); fingers will involuntarily flip the cover, and you will sip three-day-old coffee.
Not a very pleasant taste, believe you me.