You'll find a lot of helpful information on the Gustavus website.
First Term Seminar - includes sample syllabi
Writing Across the Curriculum - includes sample rubric, results of program assessment, and information from Teachers Talking Writing.
Writing Center - handouts you can use on common writing issues as well as information about helping ELL writers.
Getting Started - A Guide to How the Library Works - our homegrown guide to finding and using sources for writing assignments.
Harvard Guide to Using Sources - geared to beginners, but hey - it's Harvard. You won't feel as if they're talking down to you, just solid advice about making decisions about sources and integrating them into your writing.
Harvard Writing Project - though written for students taking courses at Harvard, there's some good subject-specific advice here about writing for different disciplines (e.g. history, philosophy, economics) and writing senior theses.
Interrogating Texts (Harvard Libraries) - yes, we're on a Harvard kick here, but this is a good list of strategies for conquering complex readings.
Purdue Online Writing Lab (OWL) - a resources for all kinds of writing advice.