Wake Back to Bed - Sleep early + Wake early + AP Intention = An Astral Projection

Sleeping early say around 8-9pm and waking up around 3-4am then staying awake for about an hour increases the chances of achieving an astral projection.

You can intend or affirm the night before that you will wake up at a certain time, then upon waking up think of any dreams you can remember, you might even want to write it down in your dream journal. Also get up and walk a bit so you're somewhat awake. Then, just before going back to sleep set an intention to astral project.

This technique is known as the Wake Back To Bed Technique.