Picking Credit Card Bonuses To Minimize Credit Score Impact

The Ask Mr Credit Card blog has a good review of how credit card applications affect your credit score along with some strategies to minimize their impact on your credit score. Here's an excerpt:

I get a lot of miles through sign up bonuses. I do so while maintaining a high credit score. How do I do it? I don’t sign up for eight cards with a 25,000 mile bonus, I sign up for two cards with a 100k bonus.