I know you're supposed to wake up 5-6 hours after you've fallen asleep, but now that it's summer, my sleep schedule isn't as uniform as it was during school. Now, I sometimes fall asleep at 2, 4, and maybe 6. Once I had a lucid dream at around 7 and the other day I had a lucid dream around 10. I don't know when to set my alarm because when I did this morning, I woke up after the REM stage. What should I do to make sure I wake up during the REM stage? What time should I set my alarm clock to be safe?