Hardcore PubMeding (advanced PubMed searching)
PubMed  at http://www.pubmed.org is maybe the best search machine for articles in biology. It is run by the NCBI , USA, and gives you the possibility to search a gigantic archive of life science literature.
But searching is not easy. Type almost any single term and you will get thousands of hits which you will never be able to browse let alone read. So, to find your preferred needle in the haystack you will need to learn how wring the best out of PubMed.
Below you find some tips how to become a hardcore PubMeder. Please add your own tricks if you miss them on this page.