I just recently got my first mac. I do lots of programming on windows but now I want to get into Mac development. What are some languages i should know or tools i should use to
I second hunterjrj's suggestion of Aaron Hillegass's book.
Another book that I'm reading at the moment which is a good tour of Xcode 3 is Fritz Anderson's Xcode 3 Unleashed.
Apple's development website also has lots of programming guides and video. Sign up at developer.apple.com. If you have an apple.com account already (or iTunes) it is easy to extend that to a developer membership. Note that you don't get all the developer info unless you pay for a full ADC membership. But all the API docs and programming guides are available without paying.