Capital Community College Foundation
Guide to Grammar and Writing: The Deadly Sins Checklist
Lists five "deadly sins" to purge from your writing. If you're not sure how to correct these errors, just click on the list item to link to more information.
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If I Were a Carpenter: The Tools of the Writer
Twenty tips for writers, slanted toward fiction, from the director of the National Writers' Workshop. Tips are divided into four areas: sentences and paragraphs, language, effects, and structure.
Other
Mapping the World by Heart: Never Say Neverisms
You can use columnist William Safire's "neverisms" as a fun editing/proofreading checklist. Each item on the list violates the rule it states.
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Sweet Briar College: Common Writing Errors
This list from the Sweet Briar College of sixteen common writing errors makes an effective proofreading checklist. Examples of errors and corrections included when appropriate.