Insofar as cocaine use is concerned, I have - after many years of foolishly self-destructive behavior discovered a very nice way to do coke. Take a nasal decongestant sprayer bottle, empty it. Take a small amount of powdered cocaine - 1/4 to 1/2 a gram - and dissolve it in maybe a cubic inch of water. Add a drop or two of vodka or other ethanol. Stir it. The cocaine dissolves into the water, leaving the cut(s) on the bottom, a side benefit I didn't originally anticipate. pour the solution - a 7% solution, if I may offer a nickname - into yon vile vial, and apply to your nasal cavities, judiciously.

If overfilled, you will get a jet of solution. Otherwise, you get a nice mix of solution and air in a mist that dissolves easily into your nasal passages, with consequent bodily effects approximately equivalent to a cup of coffee. This is advantageous for many, many reasons ...

1. No waste. You get exactly what your body can absorb, and no crumbs clinging to your nasal passages and falling down your front. you don't get so much that the effect borders on toxicity, as you do when doing lines. And you can make a 1/2 gram last up to a week, in this fashion.
2. No paraphernalia. This fits nicely into a night bag with toothbrush or toothpaste, and is bust-free, in the car, on one's person, at one's desk, or crossing international borders. No razors, no straws, no mirrors, no 'bullets' or little brown vials waiting to fall out of your pocket.
3. No addictive sequence. it's much easier to forego tooting when using at this level, and put it aside for the night, instead of staying up 'til the wee hours. And it combines with being productive about the same way that coffee does.( I have also applied small amounts of methamphetamine in this fashion, with similar low-impact effects).

It's really a shame that the Establishment doesn't apply itself to teaching people how to use drugs intelligently and creatively, since, clearly, such paths to competence and maturity exist. If I had known ten years ago what I have learned through much reading and thinking, I would have saved myself a lot of money, and, more importantly, a lot of grief and self-destructive behavior which I have, fortunately, survived.

Please perpetuate this information as widely as possible, the better to teach people how to avoid addictive behavioral sequences while continuing to explore the realms of awareness in a mature and thoughtful manner.