Well the most common and i'd say the best way to roll a joint is to, even though it takes some time, You get a way better joint than all of the other ways. Trust me on this. Im danish so i know what im talking about:

step 1#
Lick the tip of the cigarette so it doesn't burn when you roast it (this is to get the nicotine out) when you see alot of smoke coming out of the cigarette without it burning put it in your mouth like your about to light it. Then blow the smoke out and then keep on doing this till you think its about done. Then get it up to your ear and roll it between your fingers. If its nearly hurting your ear because of the sound. Then its perfect.

step 2#
Roll the cone so its got a slightly bigger outing (where you light the joint) than the mouthing. Adjust the size of the mouthing and outing according to how much mix you have and how big you want your joint to be.

step 3#
Take a piece of A5 size paper or something in a similar size. fold it on the long side so it stays as wide but half as long and then fold it back to its a5 size. then fold it on the wide side so it stays as long but half as wide. Then fold it back and you've got a mixing tray.

step 4#
If your about to smoke some soft hashish then roll it out into a small 'sausage' and i mean very small. Then use your nails or a knife to cut it into tiny piece that are about a mm(milimeter) wide and thick. And make sure all of the hashish gets in the mixing tray.
If your about to smoke some compact hashish. Then use a lighter to soften it a bit up and then use your nails to make small pieces that also are about a mm(milimeter) wide and thick. Unless you want to have some presents in your joint. Then make them slightly bigger like 2 mm(milimeters) wide and thick. And make sure all of the hashish gets in the mixing tray.
If your about to smoke some weed or pot and dont have a grinder then just get it in the palm of your hand and grind it with your other hand till its about the same size as the hashish would be. Once its in the right size your probably got some crystals in your palms. Use one or two fingers to get all those nice crystals down in the mixing tray with all the weed or pot.
If you have a grinder then put the weed or pot into the grinder in an amount so its not filled to the max. And just empty the grinder down into the mixing tray.

step 5#
Cut open the cigarette or break it and get all the tobacco in the mixing tray. Use a finger or two to mix the tobacco and good stuff nicely so it'll be a well mixed joint.

step 6#
Take the cone and fill it by scraping it along the bottom of the mixing tray while the mix is filling the cone up nicely. Once the cone is about half full. Stamp it on a hard surface a few times to get the mix more compact a less fuck-up-able when you smoke it. Then fill the cone to the top. Stamp it once a few more times (remember to stamp it on the filter end). Twist the remaining paper so the mix dont accidently fall out.

step 7#
Fire up a perfectly rolled joint.

Smoke weed on your own responsibility.

The Dane - out