ya, thats what i do everyday before i go to bed..it works

Zolpidem 10 mg snorted - you go sleep in a minute.
Benzodiazepines that dementor mentioned are a bit weak, I'm at 80mg of oxazepam now and dont feel sleepy at all, and even so it isnt used for insomnia treatment, as is diazepam (of wich oxazepam is active methabolite), but mostly for axiety. Temazepam is afair ok for insomnia, never tried. Other benzos good for sleeping are nitrazepam - good, estazolam (also for anxiety), clonazepam (also for epilepsy, better be careful with it because it can cause paradoxal effects like lack of self control, excitation), alprazolam - very addictive because of short T1/2. To sum up all benzodiazepines can make you feel sleepy but all they vary at stringness of effects they cause (one can be more muscle relaxant, one can cause more sefl confidence - alprazolam, one can be as sleeping pill, one is used as epilepsy drug).
The best I left for end - midazolam, it's one the strongest benzodiazepine if we mean treating insomnia, it's used with fentanyl as premedication before surgery. IT IS very strong, and can cause amnesia after using. But it's one of two benzodiazepines than are water soluble so it can be injected, some say its very good that way, i never tried, but it can also be snorted, cause of its water disvolvness.
To put all of this together the best is zolpidem, because it is not so addictive as benzodiazepines although it does affect the same receptors - GABA-a, so it is put together with them as psychoactive drugs.
There is also hydroxizinum, and others firs-generation antyhistamine drugs wich can help you sleepy but for me they are not good, cause they make you feel sleepy even after waking up, and for me it sucked.

BEWARE of benzodizepines, they can be seemed like miracle candies, but with some of them withdrawal effects are horrible, like with alprazolam (Xanax or other generics). Some ppl who used both, said that withdrawal from benzo was more horrile that withdrawal from heroine. I mean cold turkey withdrawal, because normally after long term use you have to reduce slowly doses to get out of it, because if you do it rapidly you can be affected with severe side effects.

I wrote this long post to warn those who want to start experimenting with benzos. I'm not saint I also like to use them to help fall asleep, and to relax but I'm glad I don't have regular access, because I know I would overuse them.