Here is all the info you will need:
Petty - 150
Lesser - 300
Common - 800
Greater - 1200
Grand - 1600
Black - same as Grand and Azura's Star - 1600
Petty Souls (150)
Stunted Scamp, Mud Crab, Rat
Lesser Souls (300)
Scamp, Clanfear Runt, Skeleton Guardian, Ghost, Boar, Wolf, Zombie, Troll
Common Souls (800)
Flame Atronach, Black Bear, Mountain Lion, Headless Zombie, Ancient Ghost, Faded Wraith, Skeleton Hero, Spriggan, Minotaur, Will-o-wisp
Greater Souls (1200)
Dremora Spider, Skeleton Hero, Clannfear, Fire Atronach, Deranged Zombie, Brown Bear, Daedroth
Grand Souls (1600)
Kalperklan Troll, Xivilai, Minotaur Lord, Gloom Wraith, Undead Akaviri Soldier
Souls above Grand (1600)
NPC's, True Daedra and Dremora, must have a Black Soul Gem to trap.
Here is info on Azura's Star
Speak to Mels Maryon (one of the people at the shrine) and raise his disposition to 50. He'll tell you that you need to provide Azure with an offering of Glow Dust.
Wander around, find a Will-o-the-Wisp (yellow cloud creature), kill it, then loot the glow dust. Alternatively, you can buy some in your favorite ingredient shop.
Talk to the shrine (you must be at least level 2) between 5 - 7 am or pm (dawn or dusk).
Azura will tell you to kill the five vampires in the Gutted Mine just over the mountain to the southwest.
Go there, kill the vampires and return to the shrine.
Azura will reward you with Azura's Star, an unlimited-use Grand Soul Gem.
By the way.. if you dont want to play through the game until the location is revealed to you, just go directly north of Cheydinhal. You will see the lake on your map. It is directly north of that lake.
Hope that helps.. Nathan (lvl 45)
By the way, I got my info from
http://www.uesp.net/wiki/Oblivion:Enchanting