Now in its second edition, this classic compendium offers practical advice for anyone interested in science and how it is done. Based on his extensive experience both as a researcher and a research mentor Ivan Valieias lively survey captures the essentials of working in science. Starting with history and basic principles and moving toward current practice, the chapters cover the range of activities involved in doing science, from formulating questions and designing experiments to collecting and analyzing data. Valiela pays special attention to the effective communication of science, in particular the preparation and presentation of scientific results in papers, posters, and talks