For tired eyes, rub your palms together and generate some heat. Place palms gently over closed eyes. The warmth should dissipate through your eyelids and help relax your eyes.
Now, for slouchers such as myself, sitting on the office chair for hours can wreak havoc on your back alignment. Our spine slumps, our shoulders cave forward, and our breathing shallows. A gentle exercise done every break time should correct this.
Sit at the edge of your chairs. Make sure your seatbones are in contact with the edge of the chair. Place your feet evenly on the floor hip-width apart. Make sure your knees are at a 90-degree angle.
Put your fists below your lower back and just above your buttocks. Inhale deeply, and as you exhale, push your fists, open your chest, draw your elbows in, and look up. Aaaah! Relief!
