I LOUDY second imp's recommendation of The Pragmatic Programmer. I too am a completely self-taught anaylyst, and what I lacked for in the study of methodologies I seem to have covered my six via reading and re-reading it. I still don't think like the CS types, which drives them crazy, but my solutions have stood the tests of volume, change, and time which makes it hard for them to write me off or to be the target for the corporate axe.