One option is to buy gil online. I recommend this to everyone who can splurge like $50 in real life. Think about it, that's like 2 1/2 DVD's or 1 Xbox game. But you can get 1-2 million gil for that.
If you have a steady job, spend the $50 once a month. You'll be set in no time :D and don't let anyone get mad at you for buying gil online, since your friends do it as well. And honestly, buying gil online is the best means of putting gil back into the virtual economy, thus strengthening the Auction House and bringing inflation down.
One more reason to buy gil online: It could take you days to farm 1 million gil, IF you farmed NONSTOP, or you can work 4-5 hours in real life to make the $$ to buy that million gil online. Come on, think smarter, not harder.
If you need ideas for HOW to make real life money, it's simple. Prostitute yourself. If you're homely, and chicks don't like you, then comb your hair and pick up gay guys. Do whatever you need to do for that Gil. And remember.... Real life is simply an inconvenience to your more pressing issues, like "leveling up that black mage online". Please, spend more real money on the game, and you'll see how your Real Life flourishes! <3