Research: Use blogs that publishes content that is based on research ans is relevant to what your topic is.
Keyword search: Take up a keyword search for the blog posts you are writing. Choose the ones that searched often and have less competition.
Post Ideas: At times you will just run out of ideas for post not sure what to do. use google and apps like Evernote to note down all that ticks in your mind. Something will surely turn into a new post.