i have a friend with insomnia and though sometimes weed helps its usually something else that is causing her not to get the sleep (somethings on her mind).
im a proud supporter of smoking myself i deal with bi-polar depression and it has helped me. but let me tell you one thing if you have an addictive personality you may want to think twice because it is great to be high but when you cant afford to purchase it then you may find yourself at an even lower low.
make your decision based on your feelings though and dont let any peer pressure or people telling you that its bad either. most of the time weed helps with psychological problems by masking them and talking usually helps more so feel free to add me on www.myspace.com/kazidelicious