Writing about the day to day things and creating reports about things going on in your niche are not written about enough. You can read the full list on the original post. But, consider tackling the topics you write about over and over in a new way.
Write about how you write and research the topic and give sources for more information (the places you find your information). Write about something you did, outside of the Internet: an event you attended, someone you met, something you left the building for.
6. Behind the scenes
11. Field reports