Brief daytime sleeping can provide you with cognitive and mental health benefits.
Naps can be taken at any time of the day, on a bed, couch, or anywhere that you can have a peaceful sleep. Naps can be longer or shorter e.g:
An alarm is ideal for controlling the length of your nap.
20 minutes to 2 hours
Bedclothes, if wanted
Anytime out of your regular nighttime sleep schedule, but mid-afternoon is popular as your performance and alertness declines during the day.