At Dave Ramsey's recommendation, I bought a copy of Stop Acting Rich, a book by a fellow who has done extensive research into the habits of American millionares. I don't know that I would recommend the book myself, the thing doesn't flow well, but the concepts are terrific and have changed the way I look at things. Here's one topic covered in the book.
What kind of car do you drive? Is it the kind millionares drive? I'll leave the question in this post and will come back and give the millionares' results tomorrow.
Me, I drive a Nissan Altima with over 100,000 miles on it.