Are there any good ways to prevent/cure my insomnia?

See your doctor: Insomnia has many causes, and only by talking to a trained sleep physician will he/she be able to help your with your insomnia issues, and recommend appropriate treatment course.

Sleep hygiene: Use good sleep hygiene.1. Keep a regular bedtime & wakening time (to include weekends). Get up the same time each day, regardless of what time you fell asleep. 2. Make a regular, relaxing bedtime routine. Relaxing rituals prior to bedtime may include a warm bath or shower, aroma therapy, reading, or listening to gentle music. 3. Sleep in a dark, quiet, cool room on comfortable mattress & pillows.