Do you vote before or after you read an article?

I read a little, vote, and sometimes open the article in a separate tab in my browser sometime during that process. On my Firefox, I can right-click on the title URL of the submission to choose to open the submitted article in a new tab.

One of my favorite FF features: You can middle click links to open them in a new tab.

I almost never vote. If you think I should vote, please explain how that would help me. Does HN customize my front page depending on user preferences?

I open a set of links on a dedicated Chrome window, read one article at a time, come back to the listing page and vote!