PLEASE HELP ME

I DONT KNOW WHERE TO CUT MY PLANTS TO CLONE THEM THERE IS A MAIN HEAD STEM AND ALOT OTHER SMALLER HEADS DO I CUT THOSE??? I DONT KNOW I JUST KNOW THAT THOSE LOOK LIKE THEY WILL HAVE BIG COLASS WHEN I FLOWER THEM ... dO I CUT THE LEAVES ??? PLEASE IF SOMEONE CAN SHOW ME A PICTURE OR DIAGRAM OF WHERE I SHOULD SNIP TO MAKE A CLONE OFF OY PLANT..... please someone help me.

my first clone attempt failed :( i think it was the growing medium i used


this is what i did

http://www.weedfarmer.com/cannabis/cloning_guide.php