The last works well with studying! I always studied right before sleep and would even put my book under my pillow so my subconscious self would be 'reminded' of my studying. I regularly would wake up going over the details of the information.
Genius! Where has this been all my life? An online calculator that tells you the best times to fall asleep depending on what time you need to wake up in the morning. For example: I put in 8:30 AM and it tells me 11:30 PM, 1 AM, 2:30 Am or 4 AM. You can get one or more full sleep cycles depending on when you go to bed.