• First, you need to decide what topic you will write or blog about. In searching for ideas to get inspired by, you can search for related posts, or subscribe to Google Alerts to receive notifications about new posts related and relevant to your idea or topic. You can also join forums and other online communities and know hot trends you can write about. Just make sure that your idea is unique, original, informative and relevant for your users.
• Next, decide if you will host or not, after which you will choose a domain name and then find a web host for your blog.
• Lastly, install your Wordpress. Nowadays, having a Wordpress installed is very helpful for blogging, especially with the fact that it helps you build or set-up a professional looking blog, it's SEO friendly and it's for free. These reasons are why it's also an essential final step.
Source(s): http://www.agencyseo.com/blog/where-to-look-when-searching-for-blog-posts-ideas.html