The military secret to falling asleep in two minutes (independent.co.uk)

Relax the muscles in your face, including tongue, jaw and the muscles around the eyes

Drop your shoulders as far down as they’ll go, followed by your upper and lower arm, one side at a time

Breathe out, relaxing your chest followed by your legs, starting from the thighs and working down

You should then spend 10 seconds trying to clear your mind before thinking about one of the three following images:

You’re lying in a canoe on a calm lake with nothing but a clear blue sky above you

You’re lying in a black velvet hammock in a pitch-black room

You say “don’t think, don’t think, don’t think” to yourself over and over for about 10 seconds.

The technique is said to work for 96 per cent of people after six weeks of practice.