Aoccdrnig to rscheearch at Cmabrigde Uinervtisy, it deosn't mttaer in waht oredr the ltteers in a wrod are, the olny iprmoatnt tihng is taht the frist and lsat ltteer be at the rghit pclae. The rset can be a toatl mses and you can sitll raed it wouthit a porbelm. Tihs is bcuseae the huamn mnid deos not raed ervey lteter by istlef, but the wrod as a wlohe.
It's a funny thing, and I have quite strong opinions about correct writing, which I will argue about till the cows come home and can always justify my thoughts. I tend to hit a brick wall with grammarians and pedants - we tend to disagree with each other, neither of us accepts the others opinion. My other job is teaching language and for me language is for communication, and so if the recipient understands the message - fab - if they don't, then uh uuuh - that's a fail.
However, I do find it very frustrating when I really try hard to catch all the mistakes, and even then (and sometimes even having had it checked over by someone else) and there is still a blasted mistake.
So, one thing I do do, is print it out, I have found that if it's left for a day, it's easier to see the problem, and if it's a hard copy, it's easier to see the problem. A comfort to me is that some of the best journalists I know of are apparently also crap at editing their work, but it still bugs me. I'd love to know of any other tips, or others opinions.