My psychiatrist was concerned about prescribing me the Clonazepams, because I can build up tolerance to them and they are known to be addictive (but they were great for restoration post-flashbacks, as well as help getting to sleep).
Most doctors here (in Canada) have become more reluctant now to prescribe the Clonazepams, and instead opt for a combination of SSRIs (anti-depressant) with one of the newer classes of anti-psychotic medication for it's help in reducing anxiety symptoms when combined with the anti-depressant. So, I've been prescribed a really low dose of Seroquel, known for being one of the more sedative newer-class antipsychotic meds and that's been a big relief. It's suppose to be non-addictive, and I use it according to how I'm prescribed it, which is a few hours before bedtime. I needed it because my nightmares had become so severe and hard to shake off, hyperarousal still lingering.
There are good habits that can be developed for more relaxing sleep. For example, having a regular before bedtime routine. I try to give myself an hour of light reading before sleep (nothing scary, nothing triggering). For anxiety as well, I've learnt how to do "abdominal breathing" and progressive body scan relaxation technique. I like the aromatherapy suggestions too. Anything to honour your own getting ready to wind down. I like also mid-evening to have a relaxing cup of chamomile tea. I've also got some comforting stuffies (A soft bunny I can hold), lots of pillows to make my own little nest of. . .:)
It's an interesting challenge to discover what works. Sometimes in the evenings I'll relax to doing some no-mess, no-fuss crafts (e.g. weaving bracelets, sewing). Staying off the computer late at night is also a good idea, as is maybe avoiding the news. . .? I think I'm starting to feel sleepy already! lol :) I guess this works for me, anyhow :)
Cheers,
~Nishkaa