If you're woman you can go to the street, get naked and dance, still the amount you'll get will depend on your body...if you're a man then its a hopeless quest --- Ah, and betting on germany wont give you much, you have to bet against them lol, as you know the ball is round, miracles happen
contact some advertisers who'll be interested to advertise on your site just give them a good offer to make them agree.
-sell your site for as much as possible -take out a loan -get angle investors for whatever project you need your $2,000 -whore yourself out to 100 chicks... or 10 fat chicks
Play some online poker! Instant deposit, fast and reliable cashouts from sites like Full Tilt Poker. Of course, you're gonna need some luck
If you have 300 to 400 a day, put up some one time offer or affiliate promotion or other membership or some such limited availability offer at a bargain price
Rent a high quality Camera. Pickup some girls. Shoot a porno hire a traffic spammer who will flood porn addicts to your site sell porno and premium membership + get adds on your site. 3k EASILY.
I could not even think any idea to earn even at least 500 USD May I know why you need that much and that urgent? It must be a matter of life and death?
Sell your site.. If it does get 400 visitors per day, it may be worth something,, but not 2000 or 3000 USD...