/* Apply to all text elements */
* {
    text-shadow: 

        1px 0px 0 #fff,   /* Right */
        -1px 0px 0 #fff,  /* Left */
        0px 1px 0 #fff,   /* Down */
        0px -1px 0 #fff;  /* Up */
}
p, h1, h2, {
    text-shadow: 
        3px 3px 0 #fff,   
        -3px -3px 0 #fff, 
        -3px 3px 0 #fff,  
        3px -3px 0 #fff,  
        3px 0px 0 #fff,   
        -3px 0px 0 #fff,  
        0px 3px 0 #fff,   
        0px -3px 0 #fff;
}
/* Or apply specifically to certain elements */