A few things (I had to skim this bc I have limited time so it may be covered already):
1) Black electrical tape over any blue or green light--including that smoke detector light! And minimize or get rid of red/orange light
2) Studies show (and writings from pre-light bulb days) that people used to wake up in the middle of the night. It's natural--before industrialization, this protected the tribe. People would wake up and stare at the stars and talk and think or have sex, or check on the village. So, it's not weird that you are waking up--I think that's really important, psychologically to know, because if you wake up and get frustrated, it's hard to get back to sleep.
3) Just cut the caffeine. You'll have 1/2 week of total exhaustion but then be fine. Take a little Motrin for any headaches.
4) This should not be #4 because it's really good--watch the program by the NIH and Nat Geo called "Sleepless in America"--it's on youtube for free now. It came out about or under a year ago. They have some great tips. I recall the one being you must go to bed the same night each night.
5) Some study came out last week that examined three different tribal communities. you can google this--worth checking out re dropping outdoor temperature, which then drops body temperature as a key component for inducing sleep. (also bedtime/waketimes)