I'm really trying to get into Stoner/Sludge Metal, and I was what some good bands and albums to buy to get into the genre.
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Mastodon, I'd start with their album Leviathan, then move to either Remission or their latest Blood Mountain. I think you should take this to the recommendation thread though.
Electric Wizard (especially the Dopethrone album)
Orange Goblin

Those should get you started
I was bad with usernames at age 12. Ah woe.
one word... KYUSS
Learn to swim....

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"]he's my "friend" he said he wanted me to see. It wasn't an accident...he wants to have sex
Boris, Isis, Pelican, Godflesh, Bongzilla, Kyuss, Queens of the Stoneage, Spiritual Beggars, The Sword, Sleep..
I'm just getting into sludge myself, and I'm really liking Eyehategod and Grief, so you might want to check those out. Oh, and rec thread. tsk tsk.
I really like Down, are there many other bands that kind of sound like them.
Member of the Metal Militia. PM Gibson_10 or AngelOfSorrow to join
Down, Type O negative, Alice in Chains, Queens of the Stone Age, the Album Damnation by Opeth, a few songs by Clutch are good smoke tunes aswell.
"We've had many cases in this department where a body has been found in pieces, or decomposed, and we've been able to put things together. Yes, the head, the upper part of the body, in a very badly
decomposed state"
Isis - Panopticon
Jesu - s/t
Pelican - Australasia

Those three albums got me started on sludge.