Ok, one that I started noticing about 10 years ago and gave up, as bosses, friends, family, strangers got ornery:
(Even hear Rush and other ‘professional’ broadcasters make the mistake...)
The use of “It’s” or “There’s” or “There is” when referring to more than one of something - instead of “There ARE...”
“There’s a lot of conservatives that don’t trust Mitt Romney, for good reason - he’s an optical illusion”
(just thought I’d mix grammer and politics ...)
Start listening - you’ll hear it many times in a day.
This one is quote controversial and the accepted use is ungrammatical, I think.
“There is a lot” is correct, because the verb “is” refers to a single lot, even if that lot contains many things.
“There are many conservatives” is correct.