A second challenge is the time to blog. I run a $1 Billion dollar company so when I decided to blog I knew I needed to figure out how to do it efficiently. My blog is mostly about efficiency and time management; these are topics I study.
These two challenges can be solved with a simple concept. Copy.
1 attribution. Give the credit together with the link to the original author.
2 look for something you can add to. Blogs can be synergistic. Take a concept or part of a blog post and expend on it and give your opinions, insights or views. In many cases, this can start a flow of ideas that are enriched from the original post.
3 You can use either the whole post or most usually just part of it and point people to the original.
4 I usually ask for permission which has never been denied. After all copying helps the original author and garners them some readership. And of course never copy copy written material without permission (and most blogs are not copy written).