It is important to know the difference between primary and secondary sources. Primary sources are the first-hand accounts of a topic (diaries, letters, law-texts, photographs etc). Secondary sources are about the topic (articles by academics on historical documents etc) and add a layer of interpretation and analysis. You want some of both. 
Writing can be a major source of stress and anxiety for students. The Writing Center at UNC has some great advice on that.
The UI Center for Writing serves all students of the University of Iceland. It is located on the second floor of the library.
Purdue Online Writing Lab is free for anyone to use.
Make sure you learn the principles of academic integrity and how to cite your sources according to the right citation style. University of Iceland uses Turnitin which enables users to spot plagiarism.
