21 times Om chanting while preparing yourself to sleep will help you.
Naadi Shuddhi, Ujjayi Pranayama along Naada - Anusandhana Pranayam each for 10-15 minutes or on alternate days in the morning help you.
Eat like Prince in the morning, King in afternoon and beggar in the evening- this principle will help you to manage your insomnia.
Avoid TV / internet and business planning in late evening. Play and participate with family members.