There's an animated GIF doing the rounds which sums up the plot of every episode of TV medical drama House. It's pointed and cruel and funny -- but the effect was ruined for me by a spelling mistake in one of the captions.
Here's the full GIF (via TheHarveySpecter on Imgur):
I can just about live with the complete lack of capitalisation, even on the word 'I'. It might be deemed a stylistic decision. But I can't live with this sentence describing James Wilson (played by Robert Sean Leonard): i to am in this episode. The word required here is too.
Learning the difference between to and too is vital: this isn't a distinction you can write off as something you'll never encounter. Accuracy matters.
Lifehacker's Mind Your Language column offers bossy advice on improving your writing.