Hi Bartimaeus,
As a quick herbal solution to insomnia you can try a cup of Cumin Seed Tea, add about 2 - 3 teaspoons to a cup of hot water on the stove and then allow to boil, remove the tea from the stove and allow to steep for 2 - 3 minutes, drink about 30 minutes before bed time.
You can also blend in some hops to help release tension, chomomile to improve the taste a bit and to relieve an anxiety that might be causing insomnia, and maybe a bit of st johns wort just to aid relaxation.
If you want I can blend you a tea.