One of the most helpful pieces of advice you can give someone who is just about to take up blogging for the first time is “write about what you know”. Expressing opinions and views on subjects that you’re familiar with or especially knowledgeable enables you to write with confidence. Stepping outside of your comfort zone is a more complicated proposition, unless you're writing to specifically document your learning experience. Which is why most of the people that I know who maintain a blog tend to write about the games they’re currently playing. Sometimes if someone is especially enamoured with a particular title, that single video game will be the sole focus of their blog. I did this in 2008 with Misadventures in LOTRO which catalogued my experiences playing the MMORPG The Lord of the Rings Online. It was a fun starting point and being focused on a single subject, kept me engaged with my writing.