Procrastination
Procrastination requires absolutely no equipment, training, or travel. It can be performed anywhere, at any time, by anyone with a task to avoid. The Global Federation of Deferred Action reports that procrastination achieves a participation rate of 94.7% among adults worldwide, making it humanity's most accessible activity after breathing. No lift passes required. No lessons necessary. The barrier to entry is so low that most practitioners begin unconsciously, often mastering advanced techniques before realising they've started. Research from the Oslo Institute of Behavioural Inertia confirms that procrastination can even be performed whilst sleeping, through the mechanism of 'productive dreaming about work one isn't doing.'
Skiing
Skiing demands a staggering logistical operation merely to begin. One requires mountains, snow, specialised equipment costing upwards of several hundred pounds, appropriate attire, lift passes, and often international travel. The Alpine Accessibility Commission estimates that only 6.3% of the global population has reasonable access to skiing infrastructure. Furthermore, the activity is restricted to specific seasons, altitudes, and meteorological conditions. Dr. Bernard Cliffe of the Scottish Centre for Gravitational Recreation notes that 'skiing requires more advance planning than most military operations, yet offers considerably less strategic advantage.'