"The benefits of membership to a scientific society are decreasing every year. Lately, I’m asking: Why bother?" See also: http://scienceblogs.com/confessions/2010/03/scholarly_societies_why_bother.php
"I teach critical appraisal to biological science and medical students at the University of Leicester and have devised my own list of questions". See: http://scienceoftheinvisible.blogspot.com/2010/03/begin-beyond.html
This page displays the number of entries (articles) in PubMed (Medline) published every year, that conform to search strategy (such as a phrase) you enter.
"Light thinks it travels faster than anything but it is wrong. No matter how fast light travels, it finds the darkness has always got there first, and is waiting for it." Terry Pratchett
Maintaining a blog can be a boon to your career, increasing your profile in the scientific community, connecting you to collaborators, and helping you land new grants or jobs.