If you're an email user, then you've probably experienced some form of spam. Even if your inbox isn't overrun with junk mail, there are still emails that you don't want to read-like newsletters or emails from people who haven't sent any emails in years. It might be tempting to just delete these emails without looking at them, but some may contain important information that could benefit you. There's no such thing as a perfect spam filter, so we've put together some tips on how to get rid of unwanted messages and keep your inbox tidy while you customize the Gmail spam filter.