Fatigue is obviously not caused by one late night, one deadline or one family dinner, but by the relentless stacking of all three. You just need a plan to recover more intelligently between commitments if you are figuring out how to survive festive fatigue and recognise when your body has stopped finding the pace charming. Salvage sleep where you canOne short night may be unavoidable. Avoid scheduling an important presentation, complicated negotiation or major decision immediately after a predictably late night. The aim is not to avoid work, but to reduce unnecessary opportunities for mistakes.