We've all been there: Lying awake in the small hours wishing we could get some shut-eye before the dreaded alarm goes off.
But there are things you might be doing that are stopping you from sleeping, as this sleep specialist explains.
Here are the two most important things to NOT do when you're struggling to get some sleep in the middle of the night.
See also: Top tips for a good night's sleep
See also: Top ten ways to get a better night's sleep