I understand some people just aren't grammar sticklers. That's alright; I try not to say anything about it. (My secret confession is that I don't always proofread or remember every rule either.)
However, for those times when grammar is important, I've found a really nifty reference: Dr. Grammar's FAQ. Loads of little segments answering those ever-pressing grammar questions, like accept versus except (important distinction there!).
I have a feeling it'll come in handy, which is why I'm blogging about it. My blog: personal filing drawer for Leah's brain.