I'm in the U.S. and have had extensive experience with temazepam. Here, due to it's high potential for abuse (even compared to all other legal benzos) doctors have to encode a special Rx as procedure just for it, and are not allowed in to prescribe more than 30mg/daily, if I recall correctly.
In fact I have a pretty funny story if you care to hear:
My doc was was writing my scripts in a hurry as usual on my psych visit, and stratched his head and asked "So what was your usual Restoril (temazepam) dosage again?" I was on 30mg nightly at the time, so I pondered for a second and said, "30mg...er, twice a day." So that's what he wrote and gave me. When I took it to the pharmacist to fill, she hesitated (knowing the limit, I assume), and went back to call my doc. I assumed my ploy would fail there, and just thought 'meh, oh well'. But after a short wait, I was given the bag, and upon opening it... voila! two full bottles of 30mg x 30 capsules for a month's supply. Naturally, I was grinning like an idiot all the way home. So technically I am legally prescribed an illegal amount of the substance, and have been for the past 3~4 months.
Anyway that's all besides the point. Temazepam should be consumed like almost all the other benzos, orally on an empty stomach (GFJ/cimetidine helps a little, at least to me it's wothwhile). If your tolerance is low to mild, anywhere from 30-90mgs should get you going pree-ty good and wont put to into a slumber. In fact I find many antihistames more sedative than this, and use those for insomnia (which, ironically, is what I'm prescribed temazepam for).
Obviously, what you want to watch out for is when you combine them with other CNS depressants. For example, the line between a superbly pleasant temazzie/alcohol (or opiate) nod and complete blackout is very thin. Set your downer consumtion limits before hand as it difficult to gauge in mid-intoxication. All hypnotics are notorious for their amnesic and depressive effects when used in excess and/or in conjuction with other downers and obviously temazepam is no exception. DO NOT attempt to shoot temazepam, it is perhaps a little more water soluble than other benzos (difference is negligible) but it tends to clump up and not to mention extremely irritant to the veins. I had a friend of mine who had great chemical knowledge create and emulsion that I could inject, because I absoutely positively had to try it (I am friend with the needle). It was probably the best single benzo shot I have ever experienced (markedly better than Versed, IMO), which makes it treacherously addictive, but it is undoubtedly horrendously bad for your body. If you have done any reading on it you may have come across the horrfic stories of a temazepam injection habit, so don't do that, if anything.
But temazepam is definitely a more euphoric benzo than nearly all others I have met. Combonations I enjoy are Temazepam with:
-opiates
-non hard alcohol (or very little hard alcohol)
-and certain antihistamines
All in moderation of course, I'm strained for time and have a slight more to add. But, Happy Temazzie Times!