A restful night sleep is the key to a happier life. Without a proper recharge, the next day can feel like it is an eternity long. We slog our way through the day, slow to respond and unable to think until we finally get the rest we need. Everyone has difficult sleeping from time to time, but if you find yourself really struggling to get to sleep there may be an underlying cause. If you don’t normally suffer from insomnia but suddenly can’t sleep, these reasons could be why.