Just before you go to bed, remind yourself that you are dreaming, and maybe you'll remember the earth dream when you wake up in astral.
you dream every night, usually 20-30 different dreams or different settings. the problem is just remembering them. the easiest ones to remember, of course, are the ones you're dreaming right before you wake up, especially if you're woken by someone or something before you normally wake up.
to help with your dream recall, take out a notebook and have it laying by your bed, and when you wake up in the morning, record your dream experiences. this forces you to go back and mentally go through your dreams again, often triggering more memories from dreams you just had. as long as you keep recording your dreams, your recall keeps improving.
Try setting your alarm clock to alarm every 1-2 hours, and remember to set the alarm again when you turn it off. If you find the time it takes to get from laying down to dreaming, you can get an alarm in every dream cycle.
How do I increase the chance of dreaming and remembering it the next morning?