There are many reasons why you may not be getting a good night’s sleep. Some of them are described here. An awareness of the cause is usually a first step in finding a solution. This article [here] describes a tip that may be helpful if you wake in the night and find it difficult to get back off to sleep. The ‘15 minute rule’ is an element of sleep hygiene which I have linked to in a previous entry here. Sleep apnoea is a sleep disorder that can result in tiredness, concentration difficulties and mood swings. Some details about this condition are described here.