NOTE: This list (including some of the errors I originally made) is found in several other places online.  That's fine, but I've asked that folks who want this on their own sites mention that I am the original compiler. 

For many English-speakers, the following phrases are familiar enough to be considered common expressions, proverbs, and/or clichés.  All of them originated with or were popularized by Shakespeare. 

I compiled these from multiple sources online in 2003.  Each of these words and compounds supposedly is not known to have appeared in print prior to the publication of Shakespeare's works.  For this reason, people claim that Shakespeare invented these words. 

How many of these are true coinages by "the Bard", and how many are simply the earliest written attestations of a word or words already in use, I can't tell you.  The ones that seem real are new forms of words already in the language.  Words like "advertising", "assassination", "bedazzled", "consanguineous", "dishearten", "enmesh", "eventful", "eyesore", "lackluster", "moonbeam", outbreak", "quarrelsome", "radiance", "reclusive", "seamy-side", "stealthy", "submerge", "time-honored", "undervalued", "unmitigated", "unreal", "well-read", "watchdog", and "whirligig" would have been meaningful to the audience. 

A few words are first attested in Shakespeare and seem to have caused extra problems for the typesetters.  This suggests they are really coined by Shakespeare.  One example is "denote". 

The popular book Coined by Shakespeare acknowledges that it is presenting first attestations rather than certain inventions.  For example, "alligator" appeared for the first time in print as an English word in "Romeo and Juliet", but it has Spanish antecedents, and only the terminal "-r" seems to be new with Shakespeare. " Puke" appears as a vulgar term for vomiting in the near-contemporary "Duchess of Malfi", and it seems well-known; so Shakespeare's use in "As You Like It" seems more likely just a first attestation.  The region of Dalmatia is as old as the Roman Empire, and obviously Shakespeare did not coin the adjectival form. 

Words like "anchovy", "bandit", and "zany" are just first attestations of loan-words.  By contrast, in "Troilus and Cressida", Shakespeare seems to have been having fun introducing new forms of old words, even though "orgulous" and "deracinate" never did catch on. 

Right now I'm in the process of referencing these.  I would like to hear from anyone who knows for certain about any item on this page. 

I stand corrected; one of my sources misattributed "fool's paradise" to Romeo and Juliet though it appears in Tyndale's Bible and probably earlier.