How can I get a DNA test to learn more about my ancestry?

Question:

How can I get a DNA test to learn more about my ancestry?

The National Geographic Genographic Project is one, are there any other ways?

Best Answer - Chosen by Asker: There are many, as other answers reflect, but before you spend the money for the test(s), make sure you know what you're getting - you can only trace one line (out of thousands), and you're unlikely to get more than a vague area of origin (which is unlikely to be a surprise, if you know a little about your ancestry).

While 'genetic genealogy' has its uses, it also has its limitations. Most people don't understand the latter and stand a good chance of either being disappointed or feeling as if they have wasted money to 'learn' something they already knew.