Unlimited Silver Keys/EXP/Money
When you get to the Bandit Seress/TwinBlade Quest, simply fight your way through the first two gates (killing everyone and grabbing everything). Once the gate is open to TwinBlade's area, save the game, then load the file. You'll be back in Oakvale but will have all of the items/gold/EXP and silver keys that you grabbed. If you do this a few times, then go to the Hero's Guild and max Physical Sheild then keep going, your combat multiplier will fly into the 15-20s. Use all of your Ages of Skill/Will/Might potions while your combat multiplier is still high. Keep doing this and you will easily gain EXP/silver keys along with some extra cash.
Note: The cash comes from selling the Assassin Trousers and the Steel Great-Mace that are found in the Elite Camp. You MUST sell them in OakVale before going back on the quest since you may only have one of each weapon and clothing item!!! If you sell them each time you are getting an additional 1,000 gold.
I did this trick for about an hour and had enough EXP to max all three Strength types (Physic/Toughness/Health) max Speed/Guile in the Skill category along with maxing most of the better Will spells (Physical Sheild/Slow Time/Divine Fury/Summon/Multi Strike/Multi Arrow). This makes the rest of the game A LOT easier since you would already have decent spells and attributes maxed. You also don't need to run around looking for every single silver key in the game, you can skip over some of the ones you despise getting. (For me it's the keys in Lychfeild Graveyard and searching for the unknown few in the Northern Wastes)
You should be able to find one of each type of Ages Of Skill/Will/Might Potions and one silver key every time you do this.
Added by: Ryan 2.0 Aug 12th 2010, ID#8006