Sometimes Mondays are challenging, for a wide array of reasons. Perhaps you drank a bit too much wheat grass juice this weekend. Maybe you feel groggy for staying up late to watch a certain high-profile football game last night (with a certain heartbreaking outcome for New Englanders). Whatever the reason for your lack of vim and vigor, the remedy is simple: You need an inversion! Any type will do, though the easiest is uttanasana, also known as rag doll. (See below; arm bind optional).
Other options include: Headstand, Handstand, Shoulder Stand, Forearm Stand, Prasrita (like rag doll but with legs wide apart), my Friday fav Viparita Karani, and, even, downward dog.
The goal is to place your head [melon, dome, noggin] below your heart. This circulates precious, fresh blood to your brain, clearing out fatigue, anxiety, mild depression, and, yes, even a serious case of "the Mondays."