Apart from pain which is obviously shitty until it recedes, fear is a great enemy to be mastered.
We all want to be socially accepted and we all work hard to achieve that. But in modern life that has become a real obstacle course. So when we trip up we too-easily get disheartened, or even panic that we are losing ground.
But there is always something to be learned in even the greatest setbacks: how to cope with them if nothing else.
In any case, death is our final destiny and cannot be cheated. By meditating on that fact it is relatively easy to bend fear into fearing the tragedy of arriving at death with the knowledge that fear prevented one from really living.
The true ‘fear of death’ should be a desire to live life to the fullest.