Avoid using SMS abbreviations in blog post and at least run the post through a spell-check in MS-Word before publishing. If the bloggers cannot take the time out to write proper English, why would the readers bother reading through that cryptic puzzle?
Photos are the most essential part of your blog or post. Take clear pictures on a light background to keep the focus on the product.
Blog for the fun of it and show character. It is immaterial how many write about a particular subject, it is how you write the matters.