Just up vote please. Replies are for adding to the conversation. If you are just going to agree, that is what the up vote is for.
Note: I do realize the irony of this post. I assume this is a new HNer and I hope to help educate him and all those who happen to read it, instead of just down voting him.
I usually look for titles that catch my interest, gradually working my way down the page and becoming less selective.
Often I read the comments first.