It’s always a welcome development to have a blog. Post articles about your forte; let people see you know your onions. This aids in promoting you as well as stops your website from lying static.
People should be able to follow you by subscribing to an RSS feed, and brag about your most popular blog posts to new readers.
Make sure that comments section is enabled so you can get feedback. Don’t put your users through the hassle of registering before they can add a comment to your blog post, and also avoid using anti-spam Captcha software, as this just discourages people from dropping comments. Out there, there are many anti-spam plug-ins obtainable which does not need users to perform extra work.