Don't write your own. That is unless you want to try a new language or simply want the experience. Blogs are a problem that has largely been solved -- at least

Don't write your own. That is unless you want to try a new language or simply want the experience. Blogs are a problem that has largely been solved -- at least for your intended purposes (disclaimer for this community!). WordPress is cheap, easy-to-install and will pretty much have everything you need out-of-the-box. You can then go ahead and add in a theme and plugins if you want. Focus on creating great content, not reinventing the wheel.