WordPress blog is great if you like to publish everything online, right away.
What if if you like to use the blog offline and keep the files on your computer?
Then you can use a blog/journal software to do it.
Here are a few free software for PC users: ( supports export to WordPress blog )
Windows Live Writer for Windows XP
Windows Live Writer is a desktop application that makes it easier to compose compelling blog posts using Windows Live Spaces or your current blog service. It includes a WSYIWYG blog editor as well as tools for publishing photos, maps. An included SDK allows developers to extend the capabilities of Writer to publish additional content types. Windows Live Writer is a great client for Windows Live Spaces but also works with other weblogs including Blogger, LiveJournal, TypePad, or WordPress.
More info and download : http://download.cnet.com/Windows-Live-Writer-for-Windows-XP/
Chrysanth WebStory is a free tool that can help you manage, edit, and back up your blogs and image accounts. It comes with a free online account for posting to your blogs and other sites from your PC or smartphone or other mobile device. WebStory is compatible with all major blog platforms, including Blogspot, WordPress, and LiveJournal, as well as microblogs like Twitter, Web albums like Picasa and Flickr, and other image-sharing and social-networking sites.
More info and download : http://download.cnet.com/Chrysanth-WebStory
Backup your blog. Publish your blog into a book. Features: Backup your blog before it is too late: You have spent a lot of time as well as effort to keep running a successful blog. We know your ideas, your stories, and your thoughts are priceless. Use BlogCollector to backup all your blogs before it is too late. Publish your blog into a Book (well-formatted PDF, suitable for high quality printing. Other formats are also supported).
More info and download : BlogCollector http://download.cnet.com/BlogCollector