
The Buddhist tradition identified five classic obstacles to meditation practice over 2,500 years ago, and they remain as relevant as ever: sensual desire (wanting something other than the present), ill will (aversion, irritation, boredom), sloth and torpor (sleepiness, dullness), restlessness and worry (agitation, planning), and doubt (questioning whether the practice is working). Modern practitioners add distraction by devices as a sixth. The key to working with obstacles is recognizing them as the content of practice rather than failures — the moment you notice you've been restless or sleepy is the moment of mindfulness. The obstacle itself becomes the meditation object.
Reference:
TaskLoco™ — The Sticky Note GOAT