Tags: Use of relevant tags is important from the SEO perspective. It helps the search engine track your post based on the tags you use.
Image speak - A lot of bloggers tend to ignore this, but the images on your blog speak a lot for what you write. Use good quality images and make sure they express your written stuff in utmost simplicity yet precision.
Blogging is as much about bold ideas as it is about creative expressions, Work on your language and dive into ideas fearlessly.