There are 2 ways to farm in Diablo 3. Gold Find or GF and Magic find or MF. I have done both and suggest magic finding. The best Diablo 3 magic find spots can be amazing if you get lucky. You make a more consistent income gold finding, but can hit the lottery magic finding. I have found several items worth over 15 million gold. I have also farmed with 300% base gold finding gear and have made up to 600k an hour.
IMPORTANT: This post is dated. Read my most recent post on farming!
Here: Best Diablo 3 Magic Find Spots
At some point everyone in Diablo 3 will be trying to get better gear as fast as possible. The motive is either to gear out their characters or to sell on the real money auction house. Unless you plan on dishing out a respectable amount of dough then farming will most likely be where you will start. The loot you find will be directly affected by gold find and magic find.