Advice / Bibliographies
Reading is an important part of doing research.
Part of the problem is keeping track of what you've read. I strongly recommend that you keep a bibliography (database) of everything you read that is research/work related.
Update: back when I wrote this, there weren't any good technological solutions to this. That has changed a bit.
There are now a bunch of tools, online and desktop, for research reading management. I recommend you look at them and choose one that is appropriate for the way you work. I am using Mendeley (although, it was recently conquered by an evil publishing empire). It's far from perfect, but I have made it work for me.
I recommend that you keep this as a bibtex file - that way you don't have to retype things when you need to put it into a paper.
At a bare minimum you should keep the full citation information (the more complete, the better - get page numbers, volume numbers, editor, and all those other BibTeX field that you probably don't really care about). I also keep the following information along with each record: