Pyjamas are comfortable, and therefore easy to fall asleep in. Stay in your clothes and wear jeans or something that is not comfortable enough to sleep in. The idea isn't to make yourself uncomfortable, just to avoid anything that your mind associates with sleep. The comfort will make you want to shut your eyes, a surefire way to give in to drowsiness. So sit on a hard chair, the floor, or something similar. You should focus on keeping active, so try to change your location often. Dim lights can be a source of fatigue, especially for the eyes. If you can, turn at least two lights on, as well as the TV. This will keep your eyes open and your mind alert.
لا ترتدي ملابس النوم. لا تستلقي على السرير. اجعل إضاءة الغرفة قوية.