i just read an article a week ago and did not experience a LD i hope i will soon

my question now... how long do u have to wake up in the middle of the night to record your dreams....?
it says that u have to wake up 4.5 hours write down a dream or ...more, then go back to sleep then after 1.5 hour again and then one more time... for how long... a month a year forever? because ... i would like to sleep the whole night...