Literature searching: theory and practice

I'm being painfully reminded lately about the difference between theory and practice.

In the early stages of trying to get a paper written, with a colleague, to submit to a conference, I have to keep reminding myself to keep track of what I've read and might want to quote from or refer to. But after several months of "scan, flick and `power browse’"- as a recent research paper calls it - that is proving to be very much harder to do than it sounds!