I have been lucky enough to have answers upvoted; from time to time I get downvotes without any comments that might explain them. Generally the ups outnumber the downs. Sometimes I can see where an answer might fall short, and (if I have not done so already) I amend or edit it. Sometimes I just plain can't see why someone gave me a negative result. How do more experienced users deal with this? Just move on?
There are many reasons posts get down voted and most of them you can't really do much about. If you've looked over your answer and feel it's clear, addresses the question being asked, is supported by credible sources, doesn't have any polarizing language, etc. then I would assume the down vote is for some reason other than post quality and let it go.
Here are a few of the things I imagine might be the cause of stray down votes...
- Someone is reading on their phone, and they went to scroll and fat fingered the down vote arrow without realizing it.
- Someone is having a bad day and spreading the misery to perfect strangers over the Internet makes them feel better for some weird reason.
- Someone thinks I down voted one of their posts and is getting some petty revenge.
- Someone's numerologist told them some number would mean good luck if it showed up and they're manipulating their reputation to make it happen and my post was just collateral damage.
There are so many reasons for unexplained down votes that have nothing to do with what you've written, so if you're happy with your answer don't let a single drive-by down voter cause you to second guess yourself. If you're getting multiple down votes, then take a closer look. Often there are clues in comments and other answers that might point to things in your answer that are contrary to what the community is thinking.
I will add that while I think you should review your answer if you're seeing some down-votes, I don't think they should cause you to change it if you're happy with it. You may want to tighten up phrasing that could be misinterpreted, or look for more supporting sources, but if the down-voters don't want to explain why, there's no use in speculating about it. Maybe the down-voter doesn't like posts that have contractions in them, or paragraphs with an odd number of sentences, who knows?
Since down votes seem to be so frequently accidental or otherwise irrelevant to the quality of the work being judged -- why not eliminate all down voting, and just allow up voting only?
Down voting is so negative and sometimes even aggressive or senseless, yucky. Especially when it's done anonymously.
A more positive venue might be really good for this place. Couldn't we at least try it for a period of time?
It seems that most of us are a bit lazy when it comes to up voting, which is usually fine, because it's no big loss. And some popular answers get lots of votes anyway, which sort of makes up for it.
But down voting encourages too much negativity for those who are more sensitive to that kind of thing. There will always be a few immature, grudge-holding, or overly-competitive people who would make a warped game of systematically 'abusing' someone they've taken a personal dislike to, with their only weapon: down-votes.
It just doesn't make sense to allow that sort of anonymous (therefore passive-aggressive) behavior at all. And it encourages such a negative, unpleasant, unfriendly environment -- which can't be that good for the site's general well-being.
I've been thinking about this (why not eliminate down-voting) for several weeks now, and I hope this is a good time to present the idea, in response to this very important question.
Consider eliminating down-voting as something which many of us might find produces a much more satisfactory experience on EL&U SE, while sparing us from asking these sorts of questions (i.e 'how to cope with it').
Rather than forcing us to cope with something so negative, it would be better to proactively fix the problem somehow. Maybe eliminating down-voting is the right answer after all.