For me, just keeping it friendly, upvoting interesting questions or posts, and commenting when I think I might have something of value to add.

We could probably all have a lower threshold for asking questions like "what's in your pocket right now?", "What's your most recent purchase", or even just "I love this light because...". Five a day from just you is not realistic, but I think you're on the right track. As well as creating some activity, those sort of posts might inspire others to do the same.

A bigger, more active community isn't the goal for me, but discovering cool stuff I didn't know I needed, or getting a window into other people's passions are. I get those two are related - which is probably where your question is coming from.