Writing Tips

Words and Phrases Often Misused

affect/effect 
as well as/and
between/among 
beg the question 
cliché/clichéd 
continual/continuous
different from/different than 
disinterested/uninterested 
good/well 
hopefully
infer/imply
irregardless
like/as
like/as if 
like/such as
literally/figuratively
less/fewer 
none were/none was
outside/outside of 
than me/than I
that/which 
that/who
while/although
i.e./e.g. 
who/whom 

Grammatical Errors to Avoid

between you and I
dangling modifiers
pronoun-antecedent agreement
subjunctive mood disorder

Problems in Sentence Formation to Avoid

the naked "this"

Common Punctuation Problems

Punctuation within quotation marks
Punctuating subordinate clauses
Punctuation and parentheses
Punctuating appositives
Punctuating compound sentences
Using commas in compound sentences
Punctuating compound possessives
Capitalizing and Punctuating Inside Parentheses

Common Errors Page

WSUonline's Commonly Misused Words and Phrases
Sourceaid's Commonly Misused Words
The Inigo Montoya Guide to 27 Commonly Misused Words
Squidoo's Commonly Misused Words in the English Language
Jim Loy's Some Commonly Misused Words
Bartleby's Words and Expressions Commonly Misued (from Strunk and White's The Elements of Style)
Peruse at This: Commonly Misused Words and Phrases
E-Education@psu's Commonly Misused Terms and Phrases 
Common Errors in English Usage