Meridia

This is a pretty easy mission, although you can't obtain it until you're level 10, and you'll have to find the shrine on your own, as no one is available to tell you about it. It's located almost directly west of Skingrad's Western Gate. If you head west from the Grateful Pass Stables, you should come across the Cursed Mine, then a Gate to Oblivion; slightly to the northwest of the Gate will be Meridia's Shrine.

Meridia will accept either Bonemeal or Ectoplasm as an offering; bonemeal should be easy enough to find. When you inquire with her, Meridia will task you with travelling to the Howling Mine to the east and killing the Necromancers there. You'll get the marker on your map, so fast travel to the closest point to that location and walk the rest of the way.

Although the Howling Mine appears to be just a normal mine, you'll eventually find undead creations, as well as the aforementioned Necromancers. There are five of them in all, tucked back in a hidden part of the dungeon, behind a rock that'll move out of your way as you approach it. They're all levelled above you, so they're tough individually; they'll often attack you in pairs, though. Use the door here as a barrier. Rush in from the door to kill one of them with a weapon or powerful magic, then retreat behind the door and heal up. The necromancers don't seem to wish to follow, and their summoned undead don't seem to be capable of doing so, either.

When all of the necromancers are done for, head back to Meridia to obtain the Ring of Khajiiti, a really handy little ring that'll add a permanent Chameleon effect to your character. Any stealth or thieving character will want to obtain this ring as soon as they hit level 10, and it's not all that difficult to do so.

Molag Bal

Molag Bal's shrine is going to be tough to find, since it's well off the beaten track. It's located in The Great Forest, to the west of the Imperial City. If you check your map, you should find the large "The Great Forest" words stretching from the west of the Imperial City; the Shrine of Molag Bal is just to the southwest of the word "The" there, directly south of the Ayleid ruins of Narfinsel.

You're going to need a Lion Pelt in order to obtain the services of Molag Bal. These can be difficult to find, since they only drop off of Mountain Lions, but by the time you're able to attempt Molag Bal's quest, you'll likely have seen plenty of them. They're likely to spawn in the plains of the Imperial Reserve, to the west of the Shrine, so warp out there and start running around until you come across one.

When you have a pelt in hand, return to the shrine to receive your marching orders. Molag wants you to corrupt a nearby man named Melus Petilius. Why? Well, if you travel to the village of Brindle Home and persuade someone there to talk about him, they'll tell you that Melus hasn't raised a fist in anger since his wife Vena died, and that he visits her grave once a day. Hmm.

With a little work, Melus will start a scrap. Well, technically, you start it, but hey.

Well, if you want to get Melus to attack you, then you have to take him on when he's (emotionally) vulnerable. During the noon hours, you'll be able to find him at Vena's grave near his home, where he'll be quietly mourning her. In order to get him to kill you, drop the Cursed Mace on the ground, and start attacking him! After he tells you about how badly he's going to beat you down, he'll grab the Mace and start wailing on you. To complete the mission as intended, you'll have to let him kill you, so unequip your armor and just wait for him to finish you off.

For corrupting Melus, Molag awards you the Mace of Molag Bal, a decent little weapon with Absorb Strength and Absorb Magicka enchantments.

Namira

Namira's shrine is just to the east of Bruma, to the south of the Plundered Mine, just on the other side of the Silver Road, near the "B" in "County Bruma" on your map. Your "offering" here isn't anything that you can give to Namira; instead, you're told that you're simply too pleasing to look upon to be taken seriously by Namira. How to counteract your stellar beauty? By making yourself ugly, of course. You need to have a low Personality score for Namira to speak with you.

How do you lower your Personality? Well, how do crazy homeless people do it? By drinking Cheap Wine, of course. Each shot of Cheap Wine will lower your personality by 10 points, meaning that you'll probably need four or five bottles to lower your personality. Luckily, the stuff is all over the place. There's plenty in the Chapel Hall in the Chapel of Talos in Bruma, and most homes will have a couple bottles, as well, such as Arnora's. You can also buy bottles from many innkeepers.

Casting your spell on the priests here will let the worshippers attack them.

When you have enough bottles to get your Personality ranking down to 10 or 15 or so, head back to Namira and drink as many as you can. With that done, she should deign to speak to you and give you her task: you need to travel to Anga, an Ayleid ruin, where a group of her worshipers sulk in the dark. Priests of Arkay are attempting to rid the land of Daedra worship, and have appeared with torches, causing Namira's disciples to scurry about and be disturbed. Your goal is to enter the tomb and cast Namira's Shroud spell on the priests, which will allow the worshipers to get close enough to kill them.

And...that's pretty much all there is to it. Get to Anga, find the priests, cast the spell on them, and watch the fun. After all four are dead, you can return to Namira for your reward. Note that killing any of the priests yourself may screw the quest up, so try to avoid attacking them. Nothing is hostile to you here, save for a couple of undead that'll be behind a secret door, so you shouldn't have a problem with anything here. For your efforts, you'll get the Ring of Namira, which is enchanted with both Reflect Spell and Reflect Damage.