Aight.. it's really simple - if you stick to the big pipes that buldge out of yer skin you're not likely to hit an artery .. the easy way is simply to stick it in - if blood rushes into the syringe, you hit an artery ..
Stick to the big veins in your wrist and inner-elbow..
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"I am not one of those weak-spirited, sappy Americans who want to be liked by all the people around them. I don't care if people hate my guts; I assume most of them do. The important question is: 'What are they in a position to do about it?'" (William S. Burroughs)