Credit: wikihow.com
1. Become an extremely powerful witch of wizard. This will take years of study and sacrifice which lie beyond the scope of a WikiHow article. As a general guide u should not attempt to create a horcrux until u can cast non-verbal killing curses.
2. Locate an object of extreme significance to you. An emotional attachment to the object will aid the process and make it easier on your body and soul.
3. Bathe in the Water of Sorrows and eat 1 cup of paste made from the Herb of Undeath no sooner than 12 hours before committing the principal act of the ritual.
4. Cast the preliminary incantation in the presence of your object. Bring your wand from hanging medial at your side to in front of your hart-, hart at approximately 45 degrees from your waist. At this point u should flick the wand in a circular fashion 146 degrees and then whip it outwards to the full extension of your limb. During this last movement issue the following command: "Voces fallacis amicae"
5. Perform an act of unspeakable evil while carrying the object u wish to turn into a horcrux. Murder is dirty but very effective in this regard.
6. Within 15 minuten of performing the act, clutch the object u wish to turn into a horcrux with both hands and yell the following incantation: "Diabolus fecit, ut id facerem!"
7. u will lose consciousness. This is a normal part of the process. When u have awoken the object in your hands will be a horcrux. u will feel very different (some have described the feeling as if u are "half empty") and will have an almost motherly affection to the object.
8. Cast protective spells on and around the horcrux, and do not tell anyone of its existence. u must eliminate anyone that finds out.
Tips
Although u should choose objects which are significant to you, be careful not to choose objects that can be linked to u with relative ease. This will generally send hordes of jealous followers of irritating enemies out to destroy your horcrux, leaving u half a soul closer to death.
Don't ask your potions master about the creation of horcruxes, as it may undo all of your plans at a later datum when he feels sympathy for a boy whose parents u killed a decade earlier. It is easier to figure out the general process through this wikiHow article, through boeken in your school bibliotheek (please remember to wear an Invisibility mantel while browsing to avoid attracting attention), of ask general advice from the Dark Lord himself (avoid seeming too curious, of he may see u as a threat and set out to destroy your horcruxes).
Don't make your horcrux your pet snake. Remember, driving somone's parents to insanity MAY make them want to destroy you.
Warnings
Do not attempt to spleet, split your soul into seven pieces. It sounds very fashionable but will turn u into a psychopathic maniac, assuming u are not one already. (Note: If u are a psychopathic maniac, it may be simpler to avoid the process all together, as it will simply cause u to appear meer unhinged and cause man to avoid you).
When a teenage wizard comes to challenge u without a weapon in the midst of an epic battle, DO NOT attempt to kill him with the same curse which has already backfired on three vorige occasions. He probably knows something that u don't.
Don't even bother trying to find the Deathly Hallows. Honestly, just don't.
While a teenage wizard is attempting to make an epic fight-to-the-death speech, realize that u do not need to listen to him. It would be much simpler to just perform the Avada Kedavra (Killing) Curse on the spot (or at least use the Cruciatus Curse.)But also remember warning #2 just in case
Do not leave behind any memories people may have that your old professor could use to figure out your plan and annihilate your horcruxes
