I have a stock 8800 GT i wanted to try to overclock it but i dont know how. If anyone can maybe help me and if somone has done it to the same card maybe give me a preference on how much to go
You can find some general overclocking information here.
There is also a bit of info directly relating to video cards here under the VFAQ section.
There are many tools you can use, but if you want to stick with Nvidia products you can simply download ntune. My suggestion is to read up on it and go in very small increments so to not fry your hardware.
If you have an 8800GT with the single slot cooler, you may not want to overclock it at all until you get better cooling as those run quite hot to begin with.