Just reply to HN threads. After a while, you'll have plenty of material you can remix into blog posts. You may also have some opinions that you need to express.

Just reply to HN threads. After a while, you'll have plenty of material you can remix into blog posts. You may also have some opinions that you need to express. Also: if you want to be more original, pick more original topics. Write about newer products, current tech-relevant events (any event is tech-relevant if you can see the relevance). Go to meetups and write about them. Do something (it'll be unique enough just because you're doing it) then write about that experience.