I have had insomnia since I was a baby. Ask my poor mother! Lol I've resigned myself to the fact that I'm going to be tired sometimes. I used to lay there and think about all the things I had to do the next day, knowing how tired I'd be, and I'd get frustrated to the point of tears. But, no more. I just breathe and try to relax. I have several books (about 20) by my bed and I'll pick different ones and read as I lie there. My husband was astonished to learn how many books I go through, as he's always asleep while I do my reading.
I also will set my alarm for a decent hour and I get up- no matter how tired I am. Eventually, this leads to me falling asleep at a decent hour. Getting up at the same time each day really helps me.
I hope this helps. X