Read your spam folder on gmail sometimes - there are lot of tricks. Re: or even Re:Re:, female's names, ridiculous names, and unimaginable subjects. They're try

Read your spam folder on gmail sometimes - there are lot of tricks. Re: or even Re:Re:, female's names, ridiculous names, and unimaginable subjects. They're trying really hard.. =) Another quite obvious thing - put misspellings in your ad-words list.