Now you can start with your blog post probably with a short essay of 2-3 paragraphs which is not that short nor too long for a blog post. Blogs are usually shorter than regular articles which aims to provide straight information because there will be a lot of distracting internet content which will grab the readers attention.
Now how do you get their full attention aside from the blog post which is written? This is where you can utilize multimedia content. You can choose from photographs, videos, flash animations, forms, and other website content which should be relevant to the topic discussed. This would now depend on you available resources if you can provide original content, that would be the best. However if not, you can also scout the web for content but remember that some content have copyrights which might not allow you to have them posted on your blog. Though uploading identical content is not advisable, you can also check if you can use a certain media either by embedding options or asking permission from the creator. You may also want to check on open resources which can provide free content.