How do I begin freelance translating (Spanish - English)?

I'm bilingual english-spanish, and would like any advice and/or experiences in translating, specifically written translations. Do I need to become certified? What's the process for this? If I just want to pick up some occasional work, like translating letters/resumes/short documents for people, can I just throw up some signs? What would be a reasonable rate to charge? (I'm in Connecticut if that makes any difference!)

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www.proz.comHow do I begin freelance translating (Spanish - English)?
I am an Spanish/English interpreter/translator. I am certified by Jewish Vocational Services. In Kansas where I live you get $20.00 to $25.00 an hour if you work part-time. If you work for a hospital or clinic full time, you get about $10.00 to $15.00 an hour but you have to combine the work. For ex: as a receptionist, medical records etc..How do I begin freelance translating (Spanish - English)?
sometimes u can go to the courthouse, welfare office etc. and they will hire u part time or on a as needed basis. they do here in tx anyway especially in the small towns. even the schools will use u.