It could be that you might want to see if varying the time you go to bed helps. If I go to bed at 9PM or even 10PM, I tend to get up for a couple of hours (1A or 2 AM until 3 or 4AM) then I go back to bed and sleep well. What do I do at that time? I read, or I sit on the porch and listen to the crickets, think, journal or work on work stuff... sometimes I might even rearrange furniture, if I'm restless.. but that irritates the sleepers 🙂 ... I try not to go on the computer, but sometimes I do. On the other hand if I go to bed at 11P or so, I can usually sleep until 6AM without much restlessness. I usually get one night with 8 hours of sleep in any one week. The other nights are usually about 6-6.5 hours. I avoid all caffeine after 12noon, and I try not to do any exercise that increases my heart rate after 8PM as it will shorten my sleep to about 3 or 4 hours - then I AM tired! So, if you ARE tired, log things you eat that could be triggers, log exercise times, even tv shows and computer times can disrupt sleep patterns.
Did you know that before electricity was invented, it was normal to have a "second sleep" with time between the two sleep cycles? http://www.nytimes.com/2012/09/23/opinion/sunday/rethinking-sleep.html?pagewanted=all&_r=0
