Use the following trick to keep your stolen items if you get caught. Rather than paying someone to relieve the bounty on your head, drop everything in your inventory, except gold, somewhere you will remember. The objects will not be removed from the game. Then, pay a guard. You will not lose your stolen items and the bounty will be gone. As an additional bonus, the person you stole from will not attack you anymore or be sour towards you.
Easy money
After traveling to Balmora in the beginning of the game, stop by Ravi'ir the traders house. A fairly heavy weapon such as axe or longsword of some sort is also required, which can be acquired from the Armorer a few shops down. Walk up to him and begin to bash his face in. You will have a decent fight on your hands -- save before undertaking this challenge. You should win if you remember to keep hacking. This slight case of murder early in the game will earn you the "Fiend Katana", and "Fiend Tanto". One is worth 9000 gold and the other is 3000 gold. You will also get three other enchanted weapons. Sell them to the Armorer across the street or keep them to have extremely powerful weapons early in the game. He also has an armory in the back of his house which can be raided and sold.
Easy Money/Levels
Once you've made it to Balmora go to the Fine Alchemist in the northwest section, right next to the clothier. Find the crate with the full set of Master's alchemy equipment. Hide behind the corner and steal it all. Then, go to the Mages guild and find Ajira in the basement. Buy her five kwama eggs and crab meats, then sell it back to her. Do this over and over until she has a hundred or so of each. Buy them from her and then go to your inventory and use the stolen equipment. Enter the hundred kwama eggs and crab meat as ingredients and start making potions. This will be a lot easier if you have a high alchemy skill. After you've made your restore fatigue potions go back to the alchemist and sell them to her. (She can't buy them all at once, so sleep 24 hours after she spends all her money, and she'll have another set of 3000 gold. You can repeat this process as much as you want until you have enough money. Then go out and get trained. This is tidious, but highly rewarding. I'm at level 52 right now.
Instant Skill Raise
First you most collect enough gold to get any Bound Weapon, once you have it, equip it then hold X to get it into attack position, I repeat hold it, then press and hold left and right triggers ate same time. I did this for 2 mins. and gained around a 100 points in that weapons skill.
Restore Magicka, Health and Fatigue
During gameplay, press B to bring up the menus. Use R and L Triggers till you reach the stats menu. Enter the codes and then press A over the specified attribute until full.
Use the following trick to boost all your weapon stats, with the exception of Hand-to-Hand. Note: The boost is the same as previous methods mentioned; the only exception is that you are activating all of the bound spells for each weapon at one time, then pressing the appropriate trigger buttons and holding them throughout. First, acquire all bound "weapon" spells that cover the weapon stats. Make sure you have a spell that raises long blade, short blade, blunt weapon, etc. (one of each bound-type in your magic list). Depending on how much magicka you have, you may have to enable the "Change magicka level" code to ensure your magicka continues to rise as you cast the spells. Cast all of the bound "weapon" spells one after another. Once all of them are active, hold X + L and watch the weapons switch out rapidly. As they switch, the stats associated with each type of weapon will rise tremendously. You can do this as many times as desired until the spell expires. To continue boosting your stats, simply re-do the spells and hold the appropriate buttons your controller.
Legitemate Training
Go to Dura Gra-Bols house in Balmora, by the riverfront. Go to the top floor and there should be some crates to your right. Search them until you find Gravewood Amulet (or something similar). What this amulet does is allows to summon skeletons without using Magica. Summon a skeleton, then kill it with whatever weapon you want. Repeat the process until the Amulet runs out of energy. Rest 24 hours to restore the Amulet and repeat until you are at 100 skill. Or use the cheat code.
Bountiless For Free
When you speak with Sugar-Lips Habasi at the South Wall Cornerclub in Balmora, he will remove the bounty from your character for a price. However, if you take the time to leave your money on the floor beforehand, you can get rid of your bounty and keep most (if not all) of your gold.