take a short nap
a cat nap
To sleep to much
over sleep
when you do this action
be wide awake
To sleep well and deeply.
Be sound asleep
Other way to say fall asleep
drited off
To sleep very little
sleep a wink
When some nights you have problems falling asleep.
have sleepless night
when you do this action
nod off
when you think more about something
sleep on it
sleep late
sleep in