Couple of sass mixins I use regularly * vendor prefix * placeholder text

_mixins.scss

/* Usage:
   @include vendor-prefix(border-radius, 2px); 
   */
@mixin vendor-prefix($name, $argument) {
    @each $prefix in -webkit-, -moz-, -ms-, -o-, '' {
        #{$prefix}#{$name}: $argument;
    }
}

/* Usage:
   @include placeholder( shade(#eee, 20%) );
   */
@mixin placeholder($color) {
    @each $prefix in "::-webkit-input-", ":-moz-", "::-moz-", ":-ms-input-" {
        #{$prefix}placeholder {
            color: $color;
        }
    }
}