Increasing Alchemy Skills Easily
Alchemy is one of the easiest skills to train. Just duplicate ingredients with the Dupe glitch (listed previously), and get on to making your potions. Alot of them. And you can sell the potions for alot of money too!
Related quest: On the quest where you have to rescue Hernantier from his Dreamworld, when facing the two Minotaurs in the Test of Resolve, save before you actually enter it. The Ayleid Cask is a random weapon spawner. The Greater Staff of Lightning will always be there, but the other two weapons are random.
Reload until you get the weapon with a 80 points, 9 uses of Disintegrate Weapon Enchantment. You can then destroy the hammers the Minotaurs use, and that will take a lot off the range of the attacks. Very useful when playing on higher difficulties.
Submitted by: Sander Heikamp
Free Money - Lots of it!
This cheat will net you at least 6,000 gold every week. After you become Grand Champion of the Arena, you have the option of fighting 1, 2, or 3 Minotaur Lords. Normally these guys are pretty hard to beat. But go ahead and choose 3. But instead of running forward when the gate lowers, just back up.
The Minotaurs can't fit their big heads through your hallway. Just stand back and zap them with spells, or run forward to attack then run backwards out of their reach. If you start getting beat up, just back up and wait for your magicka to refill, then heal yourself or start zapping them again.
You will receive 3200 gold for the victory, AND have the ability to pick up the 3 weapons they leave behind (usually ebony waraxes, hammers, etc.)
Submitted by: Jeramiah Smith
Increasing Speechcraft Skill Semi-quickly
Quick and easily raise your speechcraft (Xbox 360 version). Talk to someone and persuade them. Start the cirlce minigame and just keep rotating the circle and keep pushing the A button. You will gain speechcraft semi-quick doing so and there is no limit how long you can do this. Also it does not matter what the n.p.c's disposition is. You can just keep doing this and raise your speechcraft all the way up to expert level semi-quickly.
Submitted by: Nick Trick
Enemies Don't Like Borders
One of the much-vaunted new features of Oblivion NPCs is that, unlike Morrowind, they can cross zone borders. So attacking someone and running to a different area just doesn't work anymore, right? Wrong.
One thing I figured out is that while agressive NPCs can cross zone borders, they rarely do so in masses, and sometimes they don't cross at all. I figured this out during the raid on Kvatch - when I entered an area with 6 or so hostile Daedra within striking range of me. I returned through the door directly behind me, and was suprised when only one of them followed me through the zone crossing.
After many tests with this method I could never get more then 2, and usually only one, to follow me. If you're fighting a horde of enemies, this method can make dealing with them MUCH simpler.
Submitted by: Dylan Holmes
Free Unique Horse
To get a free horse or rather, a unicorn, go south of the Imperial City across the moat, you'll see on your compass a camp. Go to it then go south some till you see a shrine to Hircine, then go south more to an open field, kill the three Minotaur and there it is, a unicorn. Fast and strong, dont attack it or it wont let you ride it again. Counts as your mount, even sits outside of cities!
Submitted by: Kory Lauver
Use Apprentice as Mage Birth Sign
When creating a Mage character, always choose Apprentice as the birth sign. It will help you in the end when you need 500+ mana to use the master spells.Submitted by: Kory Lauver
Well-fed Mudcrab
On the road NE from Skingrad to the Imperial City is a cave called Greenmead Cave. Inside is a very well fed Mudcrab.
Submitted by: Anthony A.
Dark Brotherhood Horse Tip
While playing through the Dark Brotherhood Quests you are given a horse called Shadowmere by your quest giver. The horse cannot die, but it can become unconscious. While the horse is unconscious you may access it's inventory and place your loot that you dont necessarily want to get rid of, thus giving you an immortal traveling container that you can ride!
Submitted by: Andrew S.
More Oblivion Tips
There are more user submitted hints and tips for Oblivion here; Oblivion Hints and Tips - Set 2.

