The Tree of Life: Ten simple ways to share PDFs of your papers #PDFtribute

There is a spreading surge of PDF sharing going on in relation to a tribute to Aaron Swartz who died a few days ago.  For more on Aaron and tributes to him see the collection I am making here: The Tree of Life: RIP: Aaron Swartz.  For more on the PDF sharing see this CNET story for example: Researchers honor Swartz's memory with PDF protest and http://pdftribute.net. I should say, sharing your PDFs is not necessarily clearly not enough (the license on the PDF may affect what people can do with them if they feel constrained to follow the law).  It is also critical to think about the level of openness of a paper, but I will save most of the comments on that for another time. What I wanted to do here is point out various ways to share PDFs for people who don't know how ... UPDATE 1/14: See follow up post 10 things you can do to REALLY support #OpenAccess #PDFTribute Ten simple ways to share PDFs of your papers.