Thank you (kosmik and Alex) for your immediate answers.

Look at your post I think for me Previewing, PR and dipping are not the problems I have. But there is one with the very beginning: the purpose.
I have to scan all those papers for "interesting" topics but my interest now are rather general and not so specific.
And I have a problem with a purpose like: "Find something that really interests me."

Do you have an idea?

bbruehl