When we hate our enemies, we are giving them power over us: power over our sleep, our appetites, our blood pressure, our health, and our happiness.
If you can't sleep, then get up and do something instead of lying there worrying. It's the worry that gets you, not the lack of sleep.
We talk a lot about the importance of physical exercise to wake us up out of the half sleep in which so many of us walk around. But we need, even more, some spiritual and mental exercises every morning to stir us into action. Give yourself a pep talk every day.