To properly snort cocaine is a process that will be learned when using the drug.
To the virgin snorter,
The best way to start off is to cut a straw about 4 inches. You do not want this straw to be too long because you want to the cocaine to reach all the way up the straw in one good snort.
To make a good line of cocaine, a razor blade is best for chopping it up really fine and making it into a line. A glass surface or a mirror is the best...do not use a wood surface because the cocaine will fall into the grooves of the wood.
After you make your line, put one end of the straw up in your nose and snort/inhale the line up hard.
If you have good, legit coke then your nose will start to feel numb then the high follows shortly after. At this point snort back the powder repeatedly as if you are hawking a loogie. The drip of the powder will proceed to the back of your throat. By doing this you are helpin the cocaine pass more quickly as well.
Keep hawking back the cocaine, once you feel the drip in the back of your throat it is kicking in. It is perfectly normal for your mouth, nose and face to be numb.
After this, repeat...you are going to need to.