I have primary insomnia (which runs in my family). sleep hygiene has not solved the problem and i don't use caffeine. what should i try next?

Try something else: If you are willing to consider sleeping aids, there are tons of them. Plain Benadryl and like drugs (hydroxyzine or doxepin) may work for some. Then you could try ambien, lunesta, the new "non-addictive" rozerem, (ramelteon) benzodiazepines such as temazepam (restoril) and finally sedative benzo's such as lorazepam/xanax. However, you always want to weight addictiveness vs. Benefit. Herbals - valerian root.

Relaxation: Relaxation / yoga no chocolate in evening not even decaff 6 hours before sleep if no success may be sleep study / option of sleeping medication to adjust sleep cycle.

Insomnia: In addition to the good advice given and the things you have tried, consider melatonin if not tried, and clinical hypnosis. See www.asch.net for licensed referrals. Peace and good health.