Ask HN: How can I better participate in HN?

I love reading the posts and the comments - overall, the quality of conversation here is strikingly high. That's why I've been silently a reader since I first discovered HN! Here's my problem: I want to participate more but I don't have anything to say, on the topics discussed usually, that's particularly insightful. And I'd rather remain quiet than open my mouth and be proven a fool, as the cliche goes. So I usually don't say much in the comments - yet I feel an urgent to participate more. How do you recommend I go about better participating? I feel an urge to give back! :) morgan