For my students' edification, I post my typo-marred business card above. Spot the typo and win a prize (my undying enmity). Here are some "teachable moment" lessons.
1. Always, always have someone else proofread your stuff. I am a better speller than most (and a braggart, apparently). And I am a mighty fine proofreader. . . of other people's stuff.
2. So, GET OTHERS, PREFERABLY MANY OTHERS, to read whatever it is you're making-- website, t-shirt, business card, comic book, graduation announcement, resume, letter, tattoo -- before you send it to print it or put it before the world. The next time I do this, I'm gettin' Bill Gates, Stephen Colbert, and Rahm Emmanuel to read this ma' fa'.
3. Ironically, I caught this mistake myself within an hour after getting a shipment of several thousand cards and three t-shirts. I only saw it when I put a shirt on, looked in a mirror, and started reading the words backwards. This is a good example of how important it is to get some distance between our poor brains and the stuff we make. Mirror + Time = a clearer perspective.
4. Silver lining: better to catch it last night than after I handed out 1000 cards at a classics scholars convention. Tough crowd.
5. Silver lining #2. I'm not actually heading off to a classics scholars convention tomorrow. Since I had a soft deadline for myself, well before a "hard launch" this screw-up doesn't actually put me in a bad position. I can get order enough new cards to last me for about $25.
6. Silver lining #3. The cards look great and were easy to create online. I used vistaprint.com. But I would also check out the local offerings as well.