I have had Indesign CS6 crash on start up once in a great while and then when I restart it, all is fine. The only cut and paste I can think of that I use is from word documents to a text box. I have never had trouble doing that. Most of the rest is drag and drop using Adobe Bridge to find what ever I need.
Not sure what to say. I am currently typing this as I work with an indesign document throwing all kinds of stuff at it and so far no issues. Is your copy up-to-date? I say that not knowing for sure if there are any.
Sorry I am not much help. I did the standard install and know of no special tweaks that would help.