Sleep bonus is gained through the use of a [[bed]]: log out by right-clicking a vacant bed inside a completed house and select 'Bed' > 'Sleep'. A player receives 1 minute of sleep bonus for every 24 minutes of sleep, with a maximum of 5 hours of stored sleep bonus. Minimum time to stay asleep is 1 hour. (All times are in real-life time, not [[Wurm time]].)
You can freeze and resume the consumption of sleep bonus with the command '/fsleep'. There The action of activating sleep bonus is on a 4 minute delay before you can resume using SB after turning it off, but the opposite has no delay5 minutes cooldown.
You can use the '/sleep' command or press F5 to see your current remaining sleep bonus and whether it is frozen or not.