By killing somebody, and doing a special spell. The exact spell was not mentioned, in case somebody would be stupid enough to actually try it. (Actually, the spells from Harry Potter don't really work.)
He split his soul for each Horcrux:
Tom Riddle Sr (his father) was killed to make the Ring.
Moaning Myrtle was killed to make the Diary
Hepzibah Smith was killed to make Hufflepuff's cup
A muggle tramp was killed to make Slytherin's locket
An Albanian peasant was killed to make Ravenclaw's Diadem
Lily Potter was killed to make Harry Potter (the accidental Horcrux)
Bertha Jorkins was killed to make Nagini
The First Horcrux was Tom Riddles Diary, destroyed by Harry.
The Second was the Gaunt Ring, destroyed by Dumbledore.
Third was the Slytherin's Locket, destroyed by Ron.
Fourth was Hufflepuff's Goblet, destroyed by Hermione.
Fifth was Ravenclaw's Diadem, destroyed by Goyle.
Sixth was Nagini, destroyed by Neville.
And the last one was Harry, destroyed by Voldemort himself.
Tom Riddle's Diary -- Myrtle
Marvolo Gaunt's Ring -- Tom Riddle Sr.
Helga Hufflepuff's Cup -- Hepzibah Smith
Salazar Slytherin's Locket -- a Muggle tramp
Rowena Ravenclaw's Diadem -- an Albanian peasant
Harry Potter -- Lily Potter
Nagini -- Bertha Jorkins
Himself. Harry Potter cast Expelliarmus and Voldemort cast Avada Kedavra. The spells collided and the Expelliarmus spell pushed Avada Kedavra back and it hit Voldemort.
Nevile Longbottom killed Nagini by decapitating her with the sword of Godric Gryffindor.
Harry (sort of... he didn't die)
Morfin Gaunt
Hepzibah Smith
the Muggle in the beginning of the 4th book
other random people
A muggle tramp.
Totally there are seven horcruxes. Horcrux No:1 - Tom Riddle's Diary (that came in the Harry Potter & the chamber of secrets) Horcrux No:2 - Gaunt ring (which came into Voldemort's possession when he stole it from Marvolo Gaunt) Horcrux No:3 - Slytherin's Locket (original was replaced by a fake one by Regulus Black) Horcrux No:4 - Helga Hufflepuff's cup Horcrux No:5 - Rowena Ravenclaw's Diadem Horcrux No:6 - Part of voldemort's soul that was inside Harry Horcrux No:7 - Nagini (Voldemort's snake)
The Slytherin-related horcrux was Salazar Slytherin's locket, which Ron Weasley destroyed using the Sword of Gryffindor.
Voldemort took Helga Huffelpuff's Cup from a descendant of hers, Hepzibah Smith, who showed the cup to him in Borgin and Burkes. She was found dead two days later, Voldemort had poisoned her and stolen the cup as well as Salazar Slytherin's locket (which he also made into a horcrux) from her home.
He took the locket Horcrux from Voldemort.
Helga Hufflepuff's cup was owned by generations of the Hufflepuff family and was eventually passed down to Hepzibah Smith. Lord Voldemort then befriended Hepzibah Smith, poisoned her and stole the cup (along with Slytherin's locket). Voldemort then turned the cup into a Horcrux and hid it Bellatrix and Rodolphus Lestrange's vault at Gringotts.
It's Slytherin's locket.
It is Slytherin's locket.
Totally there are seven horcruxes. Horcrux No:1 - Tom Riddle's Diary (that came in the Harry Potter & the chamber of secrets) Horcrux No:2 - Gaunt ring (which came into Voldemort's possession when he stole it from Marvolo Gaunt) Horcrux No:3 - Slytherin's Locket (original was replaced by a fake one by Regulus Black) Horcrux No:4 - Helga Hufflepuff's cup Horcrux No:5 - Rowena Ravenclaw's Diadem Horcrux No:6 - Part of voldemort's soul that was inside Harry Horcrux No:7 - Nagini (Voldemort's snake)
The Slytherin-related horcrux was Salazar Slytherin's locket, which Ron Weasley destroyed using the Sword of Gryffindor.
because it was a horcrux. it would help to destroy voldemort
Voldemort took Helga Huffelpuff's Cup from a descendant of hers, Hepzibah Smith, who showed the cup to him in Borgin and Burkes. She was found dead two days later, Voldemort had poisoned her and stolen the cup as well as Salazar Slytherin's locket (which he also made into a horcrux) from her home.
He took the locket Horcrux from Voldemort.
The bottom of page 417 to 418 in the Deathly Hallows.
ill assume that you mean Horcrux's. they are: Marvolo Guant's ring (Voldemort's muggle grandfather) Tom Riddle's diary Helga Hufflepuff's cup Slazar Slytherin's locket Rowena Ravenclaw's Diadem (tiara) Nagini (Voldemort's snake) Harry Potter and... Voldemort himself!
The Horcrux which is Slytherin's locket that turns out to be a fake.
Helga Hufflepuff's cup was owned by generations of the Hufflepuff family and was eventually passed down to Hepzibah Smith. Lord Voldemort then befriended Hepzibah Smith, poisoned her and stole the cup (along with Slytherin's locket). Voldemort then turned the cup into a Horcrux and hid it Bellatrix and Rodolphus Lestrange's vault at Gringotts.
There are seven horcruxes: Tom Riddles diary, Marvolo Gaunt's ring, Helga Hufflepuff's cup, Rowena Ravenclaw's diadem, Salazar Slytherin's locket, Nagini (Voldemort's pet snake) and the part of Voldemort's soul that is in Harry Potter. Then there is the eighth part of soul that resides in Voldemort's body (this part of soul does not count as a horcrux). However, Nagini was made a horcrux after Tom Riddle's Diary was destroyed so only six horcruxes ever existed at once (Nagini was made a horcrux with the murder of Bertha Jorkins in the sixth book).