Another thing that gets to me: towards, backwards, afterwards, etc. THERE IS NO EXTRANEOUS 'S'! It's simply toward, backward, afterward, and so on.
While we're on the subject of superfluous S's, I also really get annoyed when certain store or brand names are suddenly made possessive. Consider: Kroger's, Barnes & Noble's, and many others. But there's no S, nor is there an apostrophe. They're simply Kroger, and Barnes & Noble.
"Irregardless" is another one, as mentioned above. It bothers me, and I'm told it really irked my grammar nazi of a mother too back in the day. It's a bastardized hybrid of "irrespective" and "regardless"--two words with similar meanings but used in different contexts. People try to use the hybrid as a way of making themselves look sophisticated, but to those in the know, they simply come off as ignorant.
