I'm seeing quite a few questions being answered, but left at 0 votes. I think, in most cases, if a question is worth answering, It's probably worth an upvote, too. Thoughts?
One of the benefits/side effects of a heavily up-voted question is that it gets broadcast across the network — free advertising, bringing more people into this site. I use that outcome as a catalyst/reminder to up-vote particularly good questions.
Whenever you see an intriguing question that makes you think "Wow, that's what makes this site worthwhile" or even just "hey, I wish folks knew about this", that's what triggers me to hit that up-vote button out of reflex.
Unfortunately, that reflex only comes with top-of-mind awareness and reminders like this post. Keep up the good work and vote, vote, vote.