Lots of authors nowadays are skipping the old-fashioned, costly "tour" (i.e. visiting bookstores nationwide) and going with a book blog tour instead ... Many book bloggers (with lots of subscribers) will review your book in exchange for a free copy of your work. So this method makes a ton of sense for authors on a budget. This way, you can go on a national (or worldwide) book tour without actually traveling across the nation. Think of the money you'll save!
Here's a book blog list for your convenience: http://fyreflybooks.wordpress.com/about/book-blogs-search/. When contacting blog owners, always be kind and courteous--even if they are unable to review your book. Also follow submission guidelines if they are published online.