Hey Rizomorph,
While I can't address all of your questions, I would suggest that you read through the 'how to get started' thread on the board here and the general tips section of the main site for some great information.`
How do i save time when circuit bending? theres like at least 100 points on the circuit board.
No real easy way. As you do more bending you will get a feel for what things tend to work and what things don't. It's really a matter of reading all the how to's and getting in there and bending a bunch of stuff.
How do i recognize common bending points? Maybe some tips of what looks like potential bending points?
If anyone out there has a better answer please correct me, but I'm pretty sure that after you have some of the basic knowledge from the sources listed above, you just feel it out from instrument to instrument.
Why do the keyboard allways fuck up when Iam trying to bend the ram/rom chip?
This just happens with circuit bending. If you are poking around in what is essentially the brains of the instrument you have to expect it to crash. You also have to be willing to accept the possibility that you could break whatever it is you're working on. Comes with the territory.
I have baught some paromiters but they have 3 connections points what is the third for? witch points on it sould i use if i only want to use two? Like if i want to have a bend that i want to be able to increase or decrease? sould i use one on the side and the middle or just the two on the sides?
Potentiometers, right? Use the middle point and one of the sides. Which side you use determines the direction that the potentiometer works in. You don't always need to use all three, but it can be nice. For example a pitch bend can work pretty well with all three points if you can find them. The middle would be the center point of your pitch bend. One of the sides would be the point that when connected with the middle makes the pitch of the tone drop. The other would be the point that makes the tone go higher.
You're right, circuit bending can be simultaneously fun, annoying, and time consuming. Hang in there; you can find some really unbelievable stuff if you stick with it. Good luck and enjoy