The best replacement for sleep is hibernate.

The best alternatives to sleep are rated as following:
★★★★★  hibernate
★★★★  exercise
★★  shutdown
★★  rest
★★  hibernation
★  shutdown mac
★  study
★  hibernate vista
★  asleep
★  hibernate laptop
★  wait
★  hibernate ssd
★  workout
★  meditation
★  hibernate windows 7
★  shut down
★  standby
★  hunger
★  hibernate windows
★  not to sleep
★  death
  gpa
  homework
  slept
  light sleep
  stay up
  age
  no sleep
  hibernate mode
  hibernate windows vista
  study for exam
  hibernate computer
  usleep
  gym
  hibernate windows 8
  shut down mac
  slumber
  i will put you to sleep
  coma
  shut down laptop
  night sleep
  grades
  rem sleep
  nap
  shutdown macbook pro
  eat
  shutdown imac
  turning computer off
  hibernate on computer
  electric wizard
  turn off computer
  sedation
  little sleep
  shutdown laptop
  off
  biomag
  unconscious

Your alternative for sleep is not listed? Suggest!
Speaking about sleep, one probably shouldn't forget about dreams.

Other search terms related to sleep and their ratings are:
★★★★★ dreams
★★★★★ pillow
★★★ dreaming
★★ rem
★ snoring
★ ambien
★ rest
weed
feeling rested
You have in mind a companion for sleep and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of sleep in all years. Click on graph for more.
sleep
hibernate
exercise