Below is a list of links to university Writing Centers that offer a wide variety of useful handouts and suggestions for improving writing.
The Writing Center at UNC-Chapel Hill
Writing Center at San Jose State University
The Center for Writing Studies - University of Illinois at Urbana-Champaign
Havard College Writing Center - Harvard University
Six Reading Habits to Develop in Your First Year at Harvard
Research Specific Resources:
Directory of Open Access Journals