Magnesium citrate may help with sleep, too. You could also try 50 mgs of 5-HTP or 100 mgs of L-Tryptophan. Your system needs to convert the L-Tryp to 5-HTP to serotonin and melatonin. 5-HTP bypasses the need to convert the L-Tryp. 5-HTP is also easier to find in stores. You can increase to 100 mgs or even 200 mgs if you don't notice a sweating side-effect.

Some find a complex carb or protein snack (150 to 200 calories) before bed helps with sleep. I have a slice of cheese and 4 crackers and 20 minutes later, I'm out.