OK, let's give OP a break. As we all know, sometimes **** happens. Even though for a lot of people $600 is not a large some of money when actively working, we do not know the circumstances. Sometimes people get sick, sometimes they have to relocate, etc.
JohnnyDisB
1. If the situation is really desperate and out of your control (example: parent/significant other got sick/got into accident/etc and you need to relocate, provide 24-7 care, etc and can not longer work: come to your dealer and explain things the way they are: a lot of people will understand and try to help you work it out
2. The situation is not as desperate and you still can make some money: try to see if you can pay it off over a longer time
3. Can you borrow from friends or relatives and pay it off over time?
4. Try to see if you qualify for a 0% credit card (or extend your credit - they sometimes offer you limited loan for 0% or low % (but you pay some origination fee - thus you loose more)
5. Try to see if you can find a temporary job (this summer in Western MA I saw an ad on McD store for $30/h (guess they were desperate...) At this rate take four 8 hour shifts (to cover taxes ) and quit after. Sometimes people quit early (my shortest job lasted 1 day: signed up for cleaning buses in college. Well, they wanted us to work in closed garage with some buses running engines (hmm, where was OSHA there. College kids inhaling exhaust gases???). I figured out my health was not worth the money....
6. Depending on your skill level, see if you can come up with extra money helping people you know
7. See if you can sell something that you have and do not use (or may be cancel your cable, switch to cheap phone rate, save a little on food (some people buy food at work on a regular basis, pay $5 for coffee, etc. - food bill often can be lowered without significant impact on quality of food - cook yourself for some time, pack sandwiches, visit couple of stores, compare prices, buy with coupons and on sale, farmer markets - all depends on where you live and what is available)
Other random thoughts - quit smoking (you can laugh guys, but I used to know a relatively poor couple with multiple medical conditions who used to smoke. They were complaining how life is tough when you age... Well, we calculated that between two of them they smoked throught more than $11,000 a year. That was a big eye opener for them...)
If you want us to try to give you a better advise - give us some details of your life situation earning, expenses, etc - we would be able to help you with better advise if we have specifics. Also include length of loan and minimum payment...