Using jQuery on Google's CDN but having a plan B
For personal projects or (even not so personal projects) using Google’s CDN hosted jQuery libraries is a no brainer. But what happens when you need a plan B? Or what happens when you realize that you need to have a fallback plan just in case Google is banned in a country where you have website visitors?
Don’t forget YSlow guidance that says you should put your script tags near the bottom of your page!