It all depends on what you're going to do with your blog.
If you're going to do some SEO stuff with it, make sure your website is optimized for SEO. (Onpage SEO)
Then register for google webmaster & google analytic.
If you're going to use it for e-commerce, learn how to do such thing in your website. (What plugin to use, what payment method you're going to use, etc2)
In the end what you need to do correlate with what you want to do.