I know exactly what you mean Zrenkert... I've struggled with sleep issues for a very long time now. Insomnia during high school, then in college things just completely went out the window. Definitely know what you mean when you talk about going to sleep at 1am and being able to sleep until 1pm without too much effort.
I've been on a journey myself looking for ways to get more energy and spend less time sleeping. I haven't found a real solution yet, I had no idea biphasic sleep was even an option.
Some things that really did help out though:
1. regular, deep breathing/meditation. Oxygen apparently plays a big role in energy in the body, and learning how to relax also was beneficial I think.
2. more regular exercise. In college I was spending 16 hours a day either working or procrastinating from work... no time to exercise! Once I started making the time, it helped enormously.
3. better diet. I'm still early in that experiment though, so I can't really tell you one way or the other if that'll work for you.
Best of luck, I'll be researching and experimenting with the biphasic sleep right along with you over the next month